72706424 has 16 divisors (see below), whose sum is σ = 155799600. Its totient is φ = 31159872.

The previous prime is 72706409. The next prime is 72706453. The reversal of 72706424 is 42460727.

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, 649109 + ... + 649220.

It is an arithmetic number, because the mean of its divisors is an integer number (9737475).

Almost surely, 2^72706424 is an apocalyptic number.

It is an amenable number.

72706424 is an abundant number, since it is smaller than the sum of its proper divisors (83093176).

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

72706424 is a wasteful number, since it uses less digits than its factorization.

72706424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298342 (or 1298338 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 72706424 is about 8526.8062016209. The cubic root of 72706424 is about 417.3729140964.

The spelling of 72706424 in words is "seventy-two million, seven hundred six thousand, four hundred twenty-four".