28783944 has 64 divisors (see below), whose sum is σ = 91382400. Its totient is φ = 8223552.

The previous prime is 28783943. The next prime is 28783949. The reversal of 28783944 is 44938782.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28783944.

It is not an unprimeable number, because it can be changed into a prime (28783943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8007 + ... + 11030.

It is an arithmetic number, because the mean of its divisors is an integer number (1427850).

Almost surely, 2^28783944 is an apocalyptic number.

28783944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28783944 is an abundant number, since it is smaller than the sum of its proper divisors (62598456).

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

28783944 is a wasteful number, since it uses less digits than its factorization.

28783944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19059 (or 19049 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28783944 is about 5365.0670079692. The cubic root of 28783944 is about 306.4668000342.

The spelling of 28783944 in words is "twenty-eight million, seven hundred eighty-three thousand, nine hundred forty-four".