28132944 has 80 divisors (see below), whose sum is σ = 83982720. Its totient is φ = 7948800.

The previous prime is 28132919. The next prime is 28132967. The reversal of 28132944 is 44923182.

28132944 = 637² + 638² + ... + 699².

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 33522 + ... + 34350.

It is an arithmetic number, because the mean of its divisors is an integer number (1049784).

Almost surely, 2^28132944 is an apocalyptic number.

28132944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28132944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41991360).

28132944 is an abundant number, since it is smaller than the sum of its proper divisors (55849776).

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

28132944 is a wasteful number, since it uses less digits than its factorization.

28132944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948 (or 942 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 28132944 is about 5304.0497735221. The cubic root of 28132944 is about 304.1387293871.

The spelling of 28132944 in words is "twenty-eight million, one hundred thirty-two thousand, nine hundred forty-four".