72845236 has 6 divisors (see below), whose sum is σ = 127479170. Its totient is φ = 36422616.

The previous prime is 72845207. The next prime is 72845237. The reversal of 72845236 is 63254827.

It can be written as a sum of positive squares in only one way, i.e., 62884900 + 9960336 = 7930^2 + 3156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72845195 and 72845204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72845237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9105651 + ... + 9105658.

Almost surely, 2^72845236 is an apocalyptic number.

It is an amenable number.

72845236 is a deficient number, since it is larger than the sum of its proper divisors (54633934).

72845236 is a wasteful number, since it uses less digits than its factorization.

72845236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18211313 (or 18211311 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 72845236 is about 8534.9420619006. The cubic root of 72845236 is about 417.6383630709.

The spelling of 72845236 in words is "seventy-two million, eight hundred forty-five thousand, two hundred thirty-six".