72449620 has 12 divisors (see below), whose sum is σ = 152144244. Its totient is φ = 28979840.

The previous prime is 72449599. The next prime is 72449647. The reversal of 72449620 is 2694427.

It can be written as a sum of positive squares in 2 ways, for example, as 8225424 + 64224196 = 2868^2 + 8014^2 .

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 3 ways as a sum of consecutive naturals, for example, 1811221 + ... + 1811260.

It is an arithmetic number, because the mean of its divisors is an integer number (12678687).

Almost surely, 2^72449620 is an apocalyptic number.

It is an amenable number.

72449620 is an abundant number, since it is smaller than the sum of its proper divisors (79694624).

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

72449620 is a wasteful number, since it uses less digits than its factorization.

72449620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622490 (or 3622488 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 72449620 is about 8511.7342533705. The cubic root of 72449620 is about 416.8809379696.

The spelling of 72449620 in words is "seventy-two million, four hundred forty-nine thousand, six hundred twenty".