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18680048 = 242322207
BaseRepresentation
bin100011101000…
…0100011110000
31022011001012122
41013100203300
514240230143
61504213412
7314530532
oct107204360
938131178
1018680048
11a5a9662
12630a268
133b406aa
1426a3852
15198ec68
hex11d08f0

18680048 has 30 divisors (see below), whose sum is σ = 37851744. Its totient is φ = 8929888.

The previous prime is 18680047. The next prime is 18680083. The reversal of 18680048 is 84008681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7361 + ... + 9567.

Almost surely, 218680048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18680048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18925872).

18680048 is an abundant number, since it is smaller than the sum of its proper divisors (19171696).

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

18680048 is a wasteful number, since it uses less digits than its factorization.

18680048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261 (or 2232 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 18680048 is about 4322.0421099291. The cubic root of 18680048 is about 265.3338523989. Note that the first 3 decimals are identical.

The spelling of 18680048 in words is "eighteen million, six hundred eighty thousand, forty-eight".

Divisors: 1 2 4 8 16 23 46 92 184 368 529 1058 2116 2207 4232 4414 8464 8828 17656 35312 50761 101522 203044 406088 812176 1167503 2335006 4670012 9340024 18680048