72945882 has 12 divisors (see below), whose sum is σ = 158049450. Its totient is φ = 24315288.

The previous prime is 72945881. The next prime is 72945893. The reversal of 72945882 is 28854927.

It can be written as a sum of positive squares in only one way, i.e., 62583921 + 10361961 = 7911^2 + 3219^2 .

It is a super-2 number, since 2×72945882² = 10642203401515848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72945881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2026257 + ... + 2026292.

Almost surely, 2^72945882 is an apocalyptic number.

72945882 is an abundant number, since it is smaller than the sum of its proper divisors (85103568).

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

72945882 is a wasteful number, since it uses less digits than its factorization.

72945882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052557 (or 4052554 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 72945882 is about 8540.8361417369. The cubic root of 72945882 is about 417.8306167188.

The spelling of 72945882 in words is "seventy-two million, nine hundred forty-five thousand, eight hundred eighty-two".