72020280 has 32 divisors (see below), whose sum is σ = 216061200. Its totient is φ = 19205376.

The previous prime is 72020261. The next prime is 72020281. The reversal of 72020280 is 8202027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72020281) 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, 299965 + ... + 300204.

Almost surely, 2^72020280 is an apocalyptic number.

It is an amenable number.

72020280 is an abundant number, since it is smaller than the sum of its proper divisors (144040920).

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

72020280 is a wasteful number, since it uses less digits than its factorization.

72020280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600183 (or 600179 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 72020280 is about 8486.4763005620. The cubic root of 72020280 is about 416.0558202955.

The spelling of 72020280 in words is "seventy-two million, twenty thousand, two hundred eighty".