72812236 has 18 divisors (see below), whose sum is σ = 148225308. Its totient is φ = 31205160.

The previous prime is 72812209. The next prime is 72812239. The reversal of 72812236 is 63221827.

It is a super-2 number, since 2×72812236² = 10603243422639392, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 72812198 and 72812207.

It is not an unprimeable number, because it can be changed into a prime (72812239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 185550 + ... + 185941.

Almost surely, 2^72812236 is an apocalyptic number.

It is an amenable number.

72812236 is an abundant number, since it is smaller than the sum of its proper divisors (75413072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72812236 is a wasteful number, since it uses less digits than its factorization.

72812236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371509 (or 371500 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 72812236 is about 8533.0086136134. The cubic root of 72812236 is about 417.5752880348.

The spelling of 72812236 in words is "seventy-two million, eight hundred twelve thousand, two hundred thirty-six".