72826556 has 24 divisors (see below), whose sum is σ = 145079424. Its totient is φ = 31663280.

The previous prime is 72826553. The next prime is 72826561. The reversal of 72826556 is 65562827.

It is a super-2 number, since 2×72826556² = 10607414517642272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72826553) 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, 34970 + ... + 36993.

It is an arithmetic number, because the mean of its divisors is an integer number (6044976).

Almost surely, 2^72826556 is an apocalyptic number.

It is an amenable number.

72826556 is a deficient number, since it is larger than the sum of its proper divisors (72252868).

72826556 is a wasteful number, since it uses less digits than its factorization.

72826556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72001 (or 71999 counting only the distinct ones).

The product of its digits is 201600, while the sum is 41.

The square root of 72826556 is about 8533.8476667913. The cubic root of 72826556 is about 417.6026611179.

It can be divided in two parts, 72 and 826556, that added together give a palindrome (826628).

The spelling of 72826556 in words is "seventy-two million, eight hundred twenty-six thousand, five hundred fifty-six".