28980944 has 40 divisors (see below), whose sum is σ = 57600480. Its totient is φ = 14122368.

The previous prime is 28980907. The next prime is 28980949. The reversal of 28980944 is 44908982.

It is a happy number.

It is a super-2 number, since 2×28980944² = 1679790230262272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28980895 and 28980904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28980949) 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 7 ways as a sum of consecutive naturals, for example, 184514 + ... + 184670.

It is an arithmetic number, because the mean of its divisors is an integer number (1440012).

Almost surely, 2^28980944 is an apocalyptic number.

It is an amenable number.

28980944 is a deficient number, since it is larger than the sum of its proper divisors (28619536).

28980944 is a wasteful number, since it uses less digits than its factorization.

28980944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 28980944 is about 5383.3952112027. The cubic root of 28980944 is about 307.1643734907.

The spelling of 28980944 in words is "twenty-eight million, nine hundred eighty thousand, nine hundred forty-four".