72141904 has 40 divisors (see below), whose sum is σ = 143408232. Its totient is φ = 35143680.

The previous prime is 72141889. The next prime is 72141913. The reversal of 72141904 is 40914127.

It can be written as a sum of positive squares in 4 ways, for example, as 22467600 + 49674304 = 4740^2 + 7048^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204192 + ... + 204544.

Almost surely, 2^72141904 is an apocalyptic number.

It is an amenable number.

72141904 is a deficient number, since it is larger than the sum of its proper divisors (71266328).

72141904 is a wasteful number, since it uses less digits than its factorization.

72141904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 72141904 is about 8493.6390316519. The cubic root of 72141904 is about 416.2898928601.

The spelling of 72141904 in words is "seventy-two million, one hundred forty-one thousand, nine hundred four".