72897012 has 18 divisors (see below), whose sum is σ = 184267538. Its totient is φ = 24298992.

The previous prime is 72897007. The next prime is 72897029. The reversal of 72897012 is 21079827.

It can be written as a sum of positive squares in only one way, i.e., 62631396 + 10265616 = 7914^2 + 3204^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2024917 = 72897012 / (7 + 2 + 8 + 9 + 7 + 0 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1012423 + ... + 1012494.

Almost surely, 2^72897012 is an apocalyptic number.

It is an amenable number.

72897012 is an abundant number, since it is smaller than the sum of its proper divisors (111370526).

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

72897012 is a wasteful number, since it uses less digits than its factorization.

72897012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024927 (or 2024922 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 72897012 is about 8537.9747012977. The cubic root of 72897012 is about 417.7372875120.

The spelling of 72897012 in words is "seventy-two million, eight hundred ninety-seven thousand, twelve".