72506236 has 24 divisors (see below), whose sum is σ = 142165296. Its totient is φ = 32065920.

The previous prime is 72506219. The next prime is 72506237. The reversal of 72506236 is 63260527.

It is a junction number, because it is equal to n+sod(n) for n = 72506198 and 72506207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72506237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20641 + ... + 23896.

It is an arithmetic number, because the mean of its divisors is an integer number (5923554).

Almost surely, 2^72506236 is an apocalyptic number.

It is an amenable number.

72506236 is a deficient number, since it is larger than the sum of its proper divisors (69659060).

72506236 is a wasteful number, since it uses less digits than its factorization.

72506236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44589 (or 44587 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 72506236 is about 8515.0593656181. The cubic root of 72506236 is about 416.9895007008.

The spelling of 72506236 in words is "seventy-two million, five hundred six thousand, two hundred thirty-six".