72038665 has 16 divisors (see below), whose sum is σ = 87686208. Its totient is φ = 56811456.

The previous prime is 72038657. The next prime is 72038683. The reversal of 72038665 is 56683027.

It is a cyclic number.

It is not a de Polignac number, because 72038665 - 2³ = 72038657 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 127674 + ... + 128236.

It is an arithmetic number, because the mean of its divisors is an integer number (5480388).

Almost surely, 2^72038665 is an apocalyptic number.

It is an amenable number.

72038665 is a deficient number, since it is larger than the sum of its proper divisors (15647543).

72038665 is a wasteful number, since it uses less digits than its factorization.

72038665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 72038665 is about 8487.5594254179. The cubic root of 72038665 is about 416.0912202109.

The spelling of 72038665 in words is "seventy-two million, thirty-eight thousand, six hundred sixty-five".