28907960 has 32 divisors (see below), whose sum is σ = 65201760. Its totient is φ = 11534976.

The previous prime is 28907951. The next prime is 28908013. The reversal of 28907960 is 6970982.

It is a congruent number.

It is an unprimeable number.

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, 25322 + ... + 26438.

It is an arithmetic number, because the mean of its divisors is an integer number (2037555).

Almost surely, 2^28907960 is an apocalyptic number.

28907960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28907960 is an abundant number, since it is smaller than the sum of its proper divisors (36293800).

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

28907960 is a wasteful number, since it uses less digits than its factorization.

28907960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 28907960 is about 5376.6123163196. The cubic root of 28907960 is about 306.9063081700.

The spelling of 28907960 in words is "twenty-eight million, nine hundred seven thousand, nine hundred sixty".