72803690 has 32 divisors (see below), whose sum is σ = 139409424. Its totient is φ = 27279360.

The previous prime is 72803681. The next prime is 72803711. The reversal of 72803690 is 9630827.

It can be written as a sum of positive squares in 8 ways, for example, as 51394561 + 21409129 = 7169^2 + 4627^2 .

It is a super-2 number, since 2×72803690² = 10600754555232200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72803690.

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, 40082 + ... + 41858.

Almost surely, 2^72803690 is an apocalyptic number.

72803690 is a deficient number, since it is larger than the sum of its proper divisors (66605734).

72803690 is a wasteful number, since it uses less digits than its factorization.

72803690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 72803690 is about 8532.5078376759. The cubic root of 72803690 is about 417.5589504051.

The spelling of 72803690 in words is "seventy-two million, eight hundred three thousand, six hundred ninety".