72978807 has 16 divisors (see below), whose sum is σ = 112396032. Its totient is φ = 41627520.

The previous prime is 72978799. The next prime is 72978809. The reversal of 72978807 is 70887927.

It is not a de Polignac number, because 72978807 - 2³ = 72978799 is a prime.

It is a super-2 number, since 2×72978807² = 10651812542286498, which contains 22 as substring.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72978809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64483 + ... + 65604.

It is an arithmetic number, because the mean of its divisors is an integer number (7024752).

Almost surely, 2^72978807 is an apocalyptic number.

72978807 is a deficient number, since it is larger than the sum of its proper divisors (39417225).

72978807 is a wasteful number, since it uses less digits than its factorization.

72978807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130118.

The product of its (nonzero) digits is 395136, while the sum is 48.

The square root of 72978807 is about 8542.7634287741. The cubic root of 72978807 is about 417.8934715521.

It can be divided in two parts, 72 and 978807, that added together give a palindrome (978879).

The spelling of 72978807 in words is "seventy-two million, nine hundred seventy-eight thousand, eight hundred seven".