72863770 has 64 divisors (see below), whose sum is σ = 157925376. Its totient is φ = 23664960.

The previous prime is 72863741. The next prime is 72863779. The reversal of 72863770 is 7736827.

It is a super-2 number, since 2×72863770² = 10618257957225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72863779) 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, 268735 + ... + 269005.

It is an arithmetic number, because the mean of its divisors is an integer number (2467584).

Almost surely, 2^72863770 is an apocalyptic number.

72863770 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72863770 is an abundant number, since it is smaller than the sum of its proper divisors (85061606).

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

72863770 is a wasteful number, since it uses less digits than its factorization.

72863770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 72863770 is about 8536.0277647159. The cubic root of 72863770 is about 417.6737799513.

The spelling of 72863770 in words is "seventy-two million, eight hundred sixty-three thousand, seven hundred seventy".