72904870 has 16 divisors (see below), whose sum is σ = 135462528. Its totient is φ = 28221120.

The previous prime is 72904841. The next prime is 72904873. The reversal of 72904870 is 7840927.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72904873) by changing a digit.

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, 117279 + ... + 117898.

It is an arithmetic number, because the mean of its divisors is an integer number (8466408).

Almost surely, 2^72904870 is an apocalyptic number.

72904870 is a deficient number, since it is larger than the sum of its proper divisors (62557658).

72904870 is a wasteful number, since it uses less digits than its factorization.

72904870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235215.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 72904870 is about 8538.4348682882. The cubic root of 72904870 is about 417.7522970969.

The spelling of 72904870 in words is "seventy-two million, nine hundred four thousand, eight hundred seventy".