72788226 has 24 divisors (see below), whose sum is σ = 169344720. Its totient is φ = 20796552.

The previous prime is 72788153. The next prime is 72788249. The reversal of 72788226 is 62288727.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123496 + ... + 124083.

It is an arithmetic number, because the mean of its divisors is an integer number (7056030).

Almost surely, 2^72788226 is an apocalyptic number.

72788226 is an abundant number, since it is smaller than the sum of its proper divisors (96556494).

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

72788226 is a wasteful number, since it uses less digits than its factorization.

72788226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247598 (or 247591 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 72788226 is about 8531.6016081390. The cubic root of 72788226 is about 417.5293841893.

The spelling of 72788226 in words is "seventy-two million, seven hundred eighty-eight thousand, two hundred twenty-six".