72272544 has 48 divisors (see below), whose sum is σ = 194852448. Its totient is φ = 23438592.

The previous prime is 72272537. The next prime is 72272573. The reversal of 72272544 is 44527227.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6622 + ... + 13725.

It is an arithmetic number, because the mean of its divisors is an integer number (4059426).

Almost surely, 2^72272544 is an apocalyptic number.

72272544 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

72272544 is an abundant number, since it is smaller than the sum of its proper divisors (122579904).

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

72272544 is a wasteful number, since it uses less digits than its factorization.

72272544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20397 (or 20389 counting only the distinct ones).

The product of its digits is 31360, while the sum is 33.

The square root of 72272544 is about 8501.3260142168. The cubic root of 72272544 is about 416.5410243752.

The spelling of 72272544 in words is "seventy-two million, two hundred seventy-two thousand, five hundred forty-four".