28875900630 has 128 divisors (see below), whose sum is σ = 74202946560. Its totient is φ = 7166361600.

The previous prime is 28875900607. The next prime is 28875900653. The reversal of 28875900630 is 3600957882.

It is an interprime number because it is at equal distance from previous prime (28875900607) and next prime (28875900653).

It is a self number, because there is not a number n which added to its sum of digits gives 28875900630.

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, 19790841 + ... + 19792299.

It is an arithmetic number, because the mean of its divisors is an integer number (579710520).

Almost surely, 2^28875900630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28875900630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37101473280).

28875900630 is an abundant number, since it is smaller than the sum of its proper divisors (45327045930).

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

28875900630 is a wasteful number, since it uses less digits than its factorization.

28875900630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 28875900630 in words is "twenty-eight billion, eight hundred seventy-five million, nine hundred thousand, six hundred thirty".