72344390 has 32 divisors (see below), whose sum is σ = 135717120. Its totient is φ = 27734400.

The previous prime is 72344351. The next prime is 72344399. The reversal of 72344390 is 9344327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72344399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32720 + ... + 34860.

It is an arithmetic number, because the mean of its divisors is an integer number (4241160).

Almost surely, 2^72344390 is an apocalyptic number.

72344390 is a deficient number, since it is larger than the sum of its proper divisors (63372730).

72344390 is a wasteful number, since it uses less digits than its factorization.

72344390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 72344390 is about 8505.5505406764. The cubic root of 72344390 is about 416.6790062123.

The spelling of 72344390 in words is "seventy-two million, three hundred forty-four thousand, three hundred ninety".