72740810 has 8 divisors (see below), whose sum is σ = 130933476. Its totient is φ = 29096320.

The previous prime is 72740809. The next prime is 72740827. The reversal of 72740810 is 1804727.

It can be written as a sum of positive squares in 2 ways, for example, as 69172489 + 3568321 = 8317^2 + 1889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×72740810² = 10582450878912200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3637031 + ... + 3637050.

Almost surely, 2^72740810 is an apocalyptic number.

72740810 is a deficient number, since it is larger than the sum of its proper divisors (58192666).

72740810 is a wasteful number, since it uses less digits than its factorization.

72740810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7274088.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 72740810 is about 8528.8223102607. The cubic root of 72740810 is about 417.4387016032.

The spelling of 72740810 in words is "seventy-two million, seven hundred forty thousand, eight hundred ten".