72472290 has 32 divisors (see below), whose sum is σ = 189746496. Its totient is φ = 17568960.

The previous prime is 72472273. The next prime is 72472303. The reversal of 72472290 is 9227427.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109477 + ... + 110136.

It is an arithmetic number, because the mean of its divisors is an integer number (5929578).

Almost surely, 2^72472290 is an apocalyptic number.

72472290 is an abundant number, since it is smaller than the sum of its proper divisors (117274206).

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

72472290 is a wasteful number, since it uses less digits than its factorization.

72472290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219634.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 72472290 is about 8513.0658402247. The cubic root of 72472290 is about 416.9244151027.

The spelling of 72472290 in words is "seventy-two million, four hundred seventy-two thousand, two hundred ninety".