72401844 has 24 divisors (see below), whose sum is σ = 178875648. Its totient is φ = 22714240.

The previous prime is 72401843. The next prime is 72401851. The reversal of 72401844 is 44810427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72401843) by changing a digit.

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, 177252 + ... + 177659.

It is an arithmetic number, because the mean of its divisors is an integer number (7453152).

Almost surely, 2^72401844 is an apocalyptic number.

It is an amenable number.

72401844 is an abundant number, since it is smaller than the sum of its proper divisors (106473804).

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

72401844 is a wasteful number, since it uses less digits than its factorization.

72401844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354935 (or 354933 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 72401844 is about 8508.9273119471. The cubic root of 72401844 is about 416.7892821713.

The spelling of 72401844 in words is "seventy-two million, four hundred one thousand, eight hundred forty-four".