28903924920 has 256 divisors, whose sum is σ = 96685424640. Its totient is φ = 6866270208.

The previous prime is 28903924913. The next prime is 28903924937. The reversal of 28903924920 is 2942930982.

It is a self number, because there is not a number n which added to its sum of digits gives 28903924920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7328469 + ... + 7332411.

It is an arithmetic number, because the mean of its divisors is an integer number (377677440).

Almost surely, 2^28903924920 is an apocalyptic number.

28903924920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28903924920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48342712320).

28903924920 is an abundant number, since it is smaller than the sum of its proper divisors (67781499720).

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

28903924920 is a wasteful number, since it uses less digits than its factorization.

28903924920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134 (or 4130 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 28903924920 in words is "twenty-eight billion, nine hundred three million, nine hundred twenty-four thousand, nine hundred twenty".