72257203284 has 24 divisors (see below), whose sum is σ = 192685875648. Its totient is φ = 20644915200.

The previous prime is 72257203283. The next prime is 72257203309. The reversal of 72257203284 is 48230275227.

It is a super-2 number, since 2×72257203284² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72257203283) 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, 430102317 + ... + 430102484.

It is an arithmetic number, because the mean of its divisors is an integer number (8028578152).

Almost surely, 2^72257203284 is an apocalyptic number.

It is an amenable number.

72257203284 is an abundant number, since it is smaller than the sum of its proper divisors (120428672364).

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

72257203284 is a wasteful number, since it uses less digits than its factorization.

72257203284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860204815 (or 860204813 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 42.

The spelling of 72257203284 in words is "seventy-two billion, two hundred fifty-seven million, two hundred three thousand, two hundred eighty-four".