28972730960 has 20 divisors (see below), whose sum is σ = 67361599668. Its totient is φ = 11589092352.

The previous prime is 28972730951. The next prime is 28972730989. The reversal of 28972730960 is 6903727982.

It can be written as a sum of positive squares in 2 ways, for example, as 8838256144 + 20134474816 = 94012^2 + 141896^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181079489 + ... + 181079648.

Almost surely, 2^28972730960 is an apocalyptic number.

28972730960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28972730960 is an abundant number, since it is smaller than the sum of its proper divisors (38388868708).

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

28972730960 is a wasteful number, since it uses less digits than its factorization.

28972730960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362159150 (or 362159144 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 28972730960 in words is "twenty-eight billion, nine hundred seventy-two million, seven hundred thirty thousand, nine hundred sixty".