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23428580 = 2257712357
BaseRepresentation
bin101100101011…
…1110111100100
31122002021222012
41121113313210
521444203310
62154053352
7403065620
oct131276744
948067865
1023428580
111225226a
127a1a258
134b13b86
14317c180
1520cbc05
hex1657de4

23428580 has 48 divisors (see below), whose sum is σ = 57044736. Its totient is φ = 7916160.

The previous prime is 23428571. The next prime is 23428583. The reversal of 23428580 is 8582432.

It is not an unprimeable number, because it can be changed into a prime (23428583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8762 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (1188432).

Almost surely, 223428580 is an apocalyptic number.

23428580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23428580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28522368).

23428580 is an abundant number, since it is smaller than the sum of its proper divisors (33616156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23428580 is a wasteful number, since it uses less digits than its factorization.

23428580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444 (or 2442 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 23428580 is about 4840.3078414498. The cubic root of 23428580 is about 286.1422507834.

The spelling of 23428580 in words is "twenty-three million, four hundred twenty-eight thousand, five hundred eighty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 71 140 142 284 355 497 710 994 1420 1988 2357 2485 4714 4970 9428 9940 11785 16499 23570 32998 47140 65996 82495 164990 167347 329980 334694 669388 836735 1171429 1673470 2342858 3346940 4685716 5857145 11714290 23428580