72705802 has 16 divisors (see below), whose sum is σ = 118064520. Its totient is φ = 33380352.

The previous prime is 72705781. The next prime is 72705803. The reversal of 72705802 is 20850727.

It can be written as a sum of positive squares in 4 ways, for example, as 26615281 + 46090521 = 5159^2 + 6789^2 .

It is a super-2 number, since 2×72705802² = 10572267288926408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72705803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2227 + ... + 12262.

Almost surely, 2^72705802 is an apocalyptic number.

72705802 is a deficient number, since it is larger than the sum of its proper divisors (45358718).

72705802 is a wasteful number, since it uses less digits than its factorization.

72705802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14697.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 72705802 is about 8526.7697283321. The cubic root of 72705802 is about 417.3717238912.

The spelling of 72705802 in words is "seventy-two million, seven hundred five thousand, eight hundred two".