72071855 has 8 divisors (see below), whose sum is σ = 86659200. Its totient is φ = 57542176.

The previous prime is 72071849. The next prime is 72071897. The reversal of 72071855 is 55817027.

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

It is a cyclic number.

It is not a de Polignac number, because 72071855 - 2⁸ = 72071599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11615 + ... + 16704.

It is an arithmetic number, because the mean of its divisors is an integer number (10832400).

Almost surely, 2^72071855 is an apocalyptic number.

72071855 is a deficient number, since it is larger than the sum of its proper divisors (14587345).

72071855 is a wasteful number, since it uses less digits than its factorization.

72071855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28833.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 72071855 is about 8489.5144148532. The cubic root of 72071855 is about 416.1551115822.

The spelling of 72071855 in words is "seventy-two million, seventy-one thousand, eight hundred fifty-five".