72861572 has 48 divisors (see below), whose sum is σ = 153323520. Its totient is φ = 29635200.

The previous prime is 72861559. The next prime is 72861583. The reversal of 72861572 is 27516827.

It is a super-2 number, since 2×72861572² = 10617617348622368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48797 + ... + 50267.

It is an arithmetic number, because the mean of its divisors is an integer number (3194240).

Almost surely, 2^72861572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72861572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76661760).

72861572 is an abundant number, since it is smaller than the sum of its proper divisors (80461948).

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

72861572 is a wasteful number, since it uses less digits than its factorization.

72861572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 1570 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 72861572 is about 8535.8990153352. The cubic root of 72861572 is about 417.6695800762.

The spelling of 72861572 in words is "seventy-two million, eight hundred sixty-one thousand, five hundred seventy-two".