72670518 has 24 divisors (see below), whose sum is σ = 158901600. Its totient is φ = 24000624.

The previous prime is 72670511. The next prime is 72670519. The reversal of 72670518 is 81507627.

72670518 is a `hidden beast` number, since 72 + 6 + 70 + 518 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72670511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16558 + ... + 20481.

It is an arithmetic number, because the mean of its divisors is an integer number (6620900).

Almost surely, 2^72670518 is an apocalyptic number.

72670518 is an abundant number, since it is smaller than the sum of its proper divisors (86231082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72670518 is a wasteful number, since it uses less digits than its factorization.

72670518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37156 (or 37153 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 72670518 is about 8524.7004639459. The cubic root of 72670518 is about 417.3041963744.

The spelling of 72670518 in words is "seventy-two million, six hundred seventy thousand, five hundred eighteen".