28581882 has 32 divisors (see below), whose sum is σ = 65974272. Its totient is φ = 8085744.

The previous prime is 28581829. The next prime is 28581911. The reversal of 28581882 is 28818582.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1023 + ... + 7629.

It is an arithmetic number, because the mean of its divisors is an integer number (2061696).

Almost surely, 2^28581882 is an apocalyptic number.

28581882 is an abundant number, since it is smaller than the sum of its proper divisors (37392390).

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

28581882 is a wasteful number, since it uses less digits than its factorization.

28581882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722.

The product of its digits is 81920, while the sum is 42.

The square root of 28581882 is about 5346.2025775311. The cubic root of 28581882 is about 305.7479876458.

The spelling of 28581882 in words is "twenty-eight million, five hundred eighty-one thousand, eight hundred eighty-two".