72522840 has 64 divisors (see below), whose sum is σ = 234309600. Its totient is φ = 17851392.

The previous prime is 72522803. The next prime is 72522847. The reversal of 72522840 is 4822527.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 72522798 and 72522807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72522847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21685 + ... + 24804.

Almost surely, 2^72522840 is an apocalyptic number.

It is an amenable number.

72522840 is an abundant number, since it is smaller than the sum of its proper divisors (161786760).

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

72522840 is a wasteful number, since it uses less digits than its factorization.

72522840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46516 (or 46512 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 72522840 is about 8516.0342883293. The cubic root of 72522840 is about 417.0213286079.

The spelling of 72522840 in words is "seventy-two million, five hundred twenty-two thousand, eight hundred forty".