28937505630 has 64 divisors (see below), whose sum is σ = 75880240128. Its totient is φ = 7004357760.

The previous prime is 28937505601. The next prime is 28937505677. The reversal of 28937505630 is 3650573982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28937505630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148347 + ... + 282633.

It is an arithmetic number, because the mean of its divisors is an integer number (1185628752).

Almost surely, 2^28937505630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28937505630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37940120064).

28937505630 is an abundant number, since it is smaller than the sum of its proper divisors (46942734498).

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

28937505630 is a wasteful number, since it uses less digits than its factorization.

28937505630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134961.

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 28937505630 in words is "twenty-eight billion, nine hundred thirty-seven million, five hundred five thousand, six hundred thirty".