72971185 has 32 divisors (see below), whose sum is σ = 103428864. Its totient is φ = 48384000.

The previous prime is 72971183. The next prime is 72971201. The reversal of 72971185 is 58117927.

It is not a de Polignac number, because 72971185 - 2¹ = 72971183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72971183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 302665 + ... + 302905.

It is an arithmetic number, because the mean of its divisors is an integer number (3232152).

Almost surely, 2^72971185 is an apocalyptic number.

It is an amenable number.

72971185 is a deficient number, since it is larger than the sum of its proper divisors (30457679).

72971185 is a wasteful number, since it uses less digits than its factorization.

72971185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its digits is 35280, while the sum is 40.

The square root of 72971185 is about 8542.3173085528. The cubic root of 72971185 is about 417.8789226026.

The spelling of 72971185 in words is "seventy-two million, nine hundred seventy-one thousand, one hundred eighty-five".