28620944 has 40 divisors (see below), whose sum is σ = 60987168. Its totient is φ = 12903680.

The previous prime is 28620937. The next prime is 28620953. The reversal of 28620944 is 44902682.

It is a super-2 number, since 2×28620944² = 1638316870902272, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23519 + ... + 24705.

Almost surely, 2^28620944 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 28620944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30493584).

28620944 is an abundant number, since it is smaller than the sum of its proper divisors (32366224).

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

28620944 is a wasteful number, since it uses less digits than its factorization.

28620944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28620944 is about 5349.8545774628. The cubic root of 28620944 is about 305.8872097732.

The spelling of 28620944 in words is "twenty-eight million, six hundred twenty thousand, nine hundred forty-four".