72220780 has 24 divisors (see below), whose sum is σ = 152353152. Its totient is φ = 28756992.

The previous prime is 72220727. The next prime is 72220787. The reversal of 72220780 is 8702227.

It is not an unprimeable number, because it can be changed into a prime (72220787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3637 + ... + 12556.

It is an arithmetic number, because the mean of its divisors is an integer number (6348048).

Almost surely, 2^72220780 is an apocalyptic number.

It is an amenable number.

72220780 is an abundant number, since it is smaller than the sum of its proper divisors (80132372).

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

72220780 is a wasteful number, since it uses less digits than its factorization.

72220780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16425 (or 16423 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 72220780 is about 8498.2810026499. The cubic root of 72220780 is about 416.4415537777.

The spelling of 72220780 in words is "seventy-two million, two hundred twenty thousand, seven hundred eighty".