72858605 has 4 divisors (see below), whose sum is σ = 87430332. Its totient is φ = 58286880.

The previous prime is 72858589. The next prime is 72858613. The reversal of 72858605 is 50685827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50685827 = 127 ⋅399101.

It can be written as a sum of positive squares in 2 ways, for example, as 41744521 + 31114084 = 6461^2 + 5578^2 .

It is not a de Polignac number, because 72858605 - 2⁴ = 72858589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7285856 + ... + 7285865.

It is an arithmetic number, because the mean of its divisors is an integer number (21857583).

Almost surely, 2^72858605 is an apocalyptic number.

It is an amenable number.

72858605 is a deficient number, since it is larger than the sum of its proper divisors (14571727).

72858605 is a wasteful number, since it uses less digits than its factorization.

72858605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14571726.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 72858605 is about 8535.7252181639. The cubic root of 72858605 is about 417.6639106841.

The spelling of 72858605 in words is "seventy-two million, eight hundred fifty-eight thousand, six hundred five".