72520623 has 32 divisors (see below), whose sum is σ = 130014720. Its totient is φ = 39000960.

The previous prime is 72520573. The next prime is 72520627. The reversal of 72520623 is 32602527.

It is not a de Polignac number, because 72520623 - 2⁶ = 72520559 is a prime.

It is a super-3 number, since 3×72520623³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72520627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8073 + ... + 14498.

It is an arithmetic number, because the mean of its divisors is an integer number (4062960).

Almost surely, 2^72520623 is an apocalyptic number.

72520623 is a deficient number, since it is larger than the sum of its proper divisors (57494097).

72520623 is a wasteful number, since it uses less digits than its factorization.

72520623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22604 (or 22598 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 72520623 is about 8515.9041211136. The cubic root of 72520623 is about 417.0170791618.

The spelling of 72520623 in words is "seventy-two million, five hundred twenty thousand, six hundred twenty-three".