72470865 has 8 divisors (see below), whose sum is σ = 115953408. Its totient is φ = 38651120.

The previous prime is 72470857. The next prime is 72470891. The reversal of 72470865 is 56807427.

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

It is not a de Polignac number, because 72470865 - 2³ = 72470857 is a prime.

It is a super-3 number, since 3×72470865³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

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, 2415681 + ... + 2415710.

It is an arithmetic number, because the mean of its divisors is an integer number (14494176).

Almost surely, 2^72470865 is an apocalyptic number.

It is an amenable number.

72470865 is a deficient number, since it is larger than the sum of its proper divisors (43482543).

72470865 is a wasteful number, since it uses less digits than its factorization.

72470865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831399.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 72470865 is about 8512.9821449361. The cubic root of 72470865 is about 416.9216824666.

The spelling of 72470865 in words is "seventy-two million, four hundred seventy thousand, eight hundred sixty-five".