72361964 has 6 divisors (see below), whose sum is σ = 126633444. Its totient is φ = 36180980.

The previous prime is 72361963. The next prime is 72361981. The reversal of 72361964 is 46916327.

It is not an unprimeable number, because it can be changed into a prime (72361963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9045242 + ... + 9045249.

It is an arithmetic number, because the mean of its divisors is an integer number (21105574).

Almost surely, 2^72361964 is an apocalyptic number.

It is an amenable number.

72361964 is a deficient number, since it is larger than the sum of its proper divisors (54271480).

72361964 is a wasteful number, since it uses less digits than its factorization.

72361964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18090495 (or 18090493 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 72361964 is about 8506.5835680372. The cubic root of 72361964 is about 416.7127435622.

The spelling of 72361964 in words is "seventy-two million, three hundred sixty-one thousand, nine hundred sixty-four".