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82138828 = 2279259933
BaseRepresentation
bin1001110010101…
…01011011001100
312201120002021211
410321111123030
5132011420303
612052304204
72015111542
oct471253314
9181502254
1082138828
1142402132
1223612064
131402ba75
14aca1d92
15732766d
hex4e556cc

82138828 has 12 divisors (see below), whose sum is σ = 145563040. Its totient is φ = 40549392.

The previous prime is 82138811. The next prime is 82138831. The reversal of 82138828 is 82883128.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129651 + ... + 130282.

Almost surely, 282138828 is an apocalyptic number.

It is an amenable number.

82138828 is a deficient number, since it is larger than the sum of its proper divisors (63424212).

82138828 is a wasteful number, since it uses less digits than its factorization.

82138828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260016 (or 260014 counting only the distinct ones).

The product of its digits is 49152, while the sum is 40.

The square root of 82138828 is about 9063.0473903649. The cubic root of 82138828 is about 434.6931874472.

The spelling of 82138828 in words is "eighty-two million, one hundred thirty-eight thousand, eight hundred twenty-eight".

Divisors: 1 2 4 79 158 316 259933 519866 1039732 20534707 41069414 82138828