72282881 has 4 divisors (see below), whose sum is σ = 78854064. Its totient is φ = 65711700.

The previous prime is 72282869. The next prime is 72282901. The reversal of 72282881 is 18828227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72282881 - 2⁶ = 72282817 is a prime.

It is a super-2 number, since 2×72282881² = 10449629771320322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72282811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3285575 + ... + 3285596.

It is an arithmetic number, because the mean of its divisors is an integer number (19713516).

Almost surely, 2^72282881 is an apocalyptic number.

It is an amenable number.

72282881 is a deficient number, since it is larger than the sum of its proper divisors (6571183).

72282881 is a wasteful number, since it uses less digits than its factorization.

72282881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571182.

The product of its digits is 28672, while the sum is 38.

The square root of 72282881 is about 8501.9339564596. The cubic root of 72282881 is about 416.5608824433.

The spelling of 72282881 in words is "seventy-two million, two hundred eighty-two thousand, eight hundred eighty-one".