72430657 has 8 divisors (see below), whose sum is σ = 81393984. Its totient is φ = 63951888.

The previous prime is 72430651. The next prime is 72430669. The reversal of 72430657 is 75603427.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72430657 - 2³ = 72430649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72430651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120823 + ... + 121420.

It is an arithmetic number, because the mean of its divisors is an integer number (10174248).

Almost surely, 2^72430657 is an apocalyptic number.

It is an amenable number.

72430657 is a deficient number, since it is larger than the sum of its proper divisors (8963327).

72430657 is a wasteful number, since it uses less digits than its factorization.

72430657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242279.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 72430657 is about 8510.6202476670. The cubic root of 72430657 is about 416.8445632537.

The spelling of 72430657 in words is "seventy-two million, four hundred thirty thousand, six hundred fifty-seven".