72067857 has 8 divisors (see below), whose sum is σ = 96972480. Its totient is φ = 47604240.

The previous prime is 72067847. The next prime is 72067861. The reversal of 72067857 is 75876027.

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

It is not a de Polignac number, because 72067857 - 2⁴ = 72067841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72067837) 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, 109869 + ... + 110522.

It is an arithmetic number, because the mean of its divisors is an integer number (12121560).

Almost surely, 2^72067857 is an apocalyptic number.

It is an amenable number.

72067857 is a deficient number, since it is larger than the sum of its proper divisors (24904623).

72067857 is a wasteful number, since it uses less digits than its factorization.

72067857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220503.

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 72067857 is about 8489.2789446454. The cubic root of 72067857 is about 416.1474163966.

The spelling of 72067857 in words is "seventy-two million, sixty-seven thousand, eight hundred fifty-seven".