72505704 has 32 divisors (see below), whose sum is σ = 182276640. Its totient is φ = 24033600.

The previous prime is 72505687. The next prime is 72505711. The reversal of 72505704 is 40750527.

It is a super-2 number, since 2×72505704² = 10514154225071232, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4002 + ... + 12689.

It is an arithmetic number, because the mean of its divisors is an integer number (5696145).

Almost surely, 2^72505704 is an apocalyptic number.

It is an amenable number.

72505704 is an abundant number, since it is smaller than the sum of its proper divisors (109770936).

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

72505704 is a wasteful number, since it uses less digits than its factorization.

72505704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16881 (or 16877 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 72505704 is about 8515.0281267885. The cubic root of 72505704 is about 416.9884808393.

The spelling of 72505704 in words is "seventy-two million, five hundred five thousand, seven hundred four".