72149240 has 32 divisors (see below), whose sum is σ = 162578880. Its totient is φ = 28816512.

The previous prime is 72149221. The next prime is 72149243. The reversal of 72149240 is 4294127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72149243) by changing a digit.

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, 47777 + ... + 49263.

It is an arithmetic number, because the mean of its divisors is an integer number (5080590).

Almost surely, 2^72149240 is an apocalyptic number.

It is an amenable number.

72149240 is an abundant number, since it is smaller than the sum of its proper divisors (90429640).

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

72149240 is a wasteful number, since it uses less digits than its factorization.

72149240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711 (or 2707 counting only the distinct ones).

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

The square root of 72149240 is about 8494.0708732621. The cubic root of 72149240 is about 416.3040030095.

The spelling of 72149240 in words is "seventy-two million, one hundred forty-nine thousand, two hundred forty".