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30136428 = 2233739863
BaseRepresentation
bin111001011110…
…1100001101100
32002201002102000
41302331201230
530203331203
62553532300
7514104210
oct162754154
962632360
1030136428
1116013a43
12a114090
13632210a
144006940
1529a44a3
hex1cbd86c

30136428 has 48 divisors (see below), whose sum is σ = 89295360. Its totient is φ = 8610192.

The previous prime is 30136411. The next prime is 30136439. The reversal of 30136428 is 82463103.

It is a happy number.

30136428 is a `hidden beast` number, since 3 + 0 + 13 + 642 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19176 + ... + 20687.

It is an arithmetic number, because the mean of its divisors is an integer number (1860320).

Almost surely, 230136428 is an apocalyptic number.

It is an amenable number.

30136428 is an abundant number, since it is smaller than the sum of its proper divisors (59158932).

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

30136428 is a wasteful number, since it uses less digits than its factorization.

30136428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39883 (or 39875 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 30136428 is about 5489.6655635840. The cubic root of 30136428 is about 311.1935534160.

The spelling of 30136428 in words is "thirty million, one hundred thirty-six thousand, four hundred twenty-eight".

Divisors: 1 2 3 4 6 7 9 12 14 18 21 27 28 36 42 54 63 84 108 126 189 252 378 756 39863 79726 119589 159452 239178 279041 358767 478356 558082 717534 837123 1076301 1116164 1435068 1674246 2152602 2511369 3348492 4305204 5022738 7534107 10045476 15068214 30136428