72309962 has 4 divisors (see below), whose sum is σ = 108464946. Its totient is φ = 36154980.

The previous prime is 72309917. The next prime is 72309971. The reversal of 72309962 is 26990327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49547521 + 22762441 = 7039^2 + 4771^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18077489 + ... + 18077492.

Almost surely, 2^72309962 is an apocalyptic number.

72309962 is a deficient number, since it is larger than the sum of its proper divisors (36154984).

72309962 is a wasteful number, since it uses less digits than its factorization.

72309962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36154983.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 72309962 is about 8503.5264449521. The cubic root of 72309962 is about 416.6128978795.

The spelling of 72309962 in words is "seventy-two million, three hundred nine thousand, nine hundred sixty-two".