72702730 has 16 divisors (see below), whose sum is σ = 131378760. Its totient is φ = 28966912.

The previous prime is 72702709. The next prime is 72702737. The reversal of 72702730 is 3720727.

It can be written as a sum of positive squares in 4 ways, for example, as 71284249 + 1418481 = 8443^2 + 1191^2 .

It is not an unprimeable number, because it can be changed into a prime (72702737) 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, 11575 + ... + 16714.

Almost surely, 2^72702730 is an apocalyptic number.

72702730 is a deficient number, since it is larger than the sum of its proper divisors (58676030).

72702730 is a wasteful number, since it uses less digits than its factorization.

72702730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28553.

The product of its (nonzero) digits is 4116, while the sum is 28.

The square root of 72702730 is about 8526.5895878716. The cubic root of 72702730 is about 417.3658454791.

It can be divided in two parts, 7270 and 2730, that added together give a 4-th power (10000 = 10⁴).

The spelling of 72702730 in words is "seventy-two million, seven hundred two thousand, seven hundred thirty".