72144290 has 32 divisors (see below), whose sum is σ = 132762240. Its totient is φ = 28220544.

The previous prime is 72144283. The next prime is 72144299. The reversal of 72144290 is 9244127.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72144299) 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, 91277 + ... + 92063.

It is an arithmetic number, because the mean of its divisors is an integer number (4148820).

Almost surely, 2^72144290 is an apocalyptic number.

72144290 is a deficient number, since it is larger than the sum of its proper divisors (60617950).

72144290 is a wasteful number, since it uses less digits than its factorization.

72144290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72144290 is about 8493.7794885434. The cubic root of 72144290 is about 416.2944822257.

The spelling of 72144290 in words is "seventy-two million, one hundred forty-four thousand, two hundred ninety".