28992980 has 12 divisors (see below), whose sum is σ = 60885300. Its totient is φ = 11597184.

The previous prime is 28992947. The next prime is 28992983. The reversal of 28992980 is 8929982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7333264 + 21659716 = 2708^2 + 4654^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28992983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724805 + ... + 724844.

It is an arithmetic number, because the mean of its divisors is an integer number (5073775).

Almost surely, 2^28992980 is an apocalyptic number.

28992980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28992980 is an abundant number, since it is smaller than the sum of its proper divisors (31892320).

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

28992980 is a wasteful number, since it uses less digits than its factorization.

28992980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449658 (or 1449656 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 28992980 is about 5384.5129770482. The cubic root of 28992980 is about 307.2068901495.

The spelling of 28992980 in words is "twenty-eight million, nine hundred ninety-two thousand, nine hundred eighty".