73712290 has 16 divisors (see below), whose sum is σ = 133068600. Its totient is φ = 29399040.

The previous prime is 73712281. The next prime is 73712321. The reversal of 73712290 is 9221737.

It can be written as a sum of positive squares in 4 ways, for example, as 70174129 + 3538161 = 8377^2 + 1881^2 .

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, 7071 + ... + 14050.

Almost surely, 2^73712290 is an apocalyptic number.

73712290 is a deficient number, since it is larger than the sum of its proper divisors (59356310).

73712290 is a wasteful number, since it uses less digits than its factorization.

73712290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21477.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 73712290 is about 8585.5861768431. The cubic root of 73712290 is about 419.2888380821.

The spelling of 73712290 in words is "seventy-three million, seven hundred twelve thousand, two hundred ninety".