72440284 has 24 divisors (see below), whose sum is σ = 146240640. Its totient is φ = 30754416.

The previous prime is 72440243. The next prime is 72440299. The reversal of 72440284 is 48204427.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9094 + ... + 15085.

It is an arithmetic number, because the mean of its divisors is an integer number (6093360).

Almost surely, 2^72440284 is an apocalyptic number.

It is an amenable number.

72440284 is an abundant number, since it is smaller than the sum of its proper divisors (73800356).

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

72440284 is a wasteful number, since it uses less digits than its factorization.

72440284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24297 (or 24295 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 72440284 is about 8511.1858163243. The cubic root of 72440284 is about 416.8630305022.

The spelling of 72440284 in words is "seventy-two million, four hundred forty thousand, two hundred eighty-four".