72947136 has 56 divisors (see below), whose sum is σ = 204368400. Its totient is φ = 22884352.

The previous prime is 72947129. The next prime is 72947141. The reversal of 72947136 is 63174927.

It is a junction number, because it is equal to n+sod(n) for n = 72947094 and 72947103.

It is a congruent number.

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, 7911 + ... + 14438.

Almost surely, 2^72947136 is an apocalyptic number.

It is an amenable number.

72947136 is an abundant number, since it is smaller than the sum of its proper divisors (131421264).

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

72947136 is a wasteful number, since it uses less digits than its factorization.

72947136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22381 (or 22371 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 72947136 is about 8540.9095534375. The cubic root of 72947136 is about 417.8330109896.

The spelling of 72947136 in words is "seventy-two million, nine hundred forty-seven thousand, one hundred thirty-six".