28867515530 has 48 divisors (see below), whose sum is σ = 62529385320. Its totient is φ = 9556138368.

The previous prime is 28867515529. The next prime is 28867515539. The reversal of 28867515530 is 3551576882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28405394521 + 462121009 = 168539^2 + 21497^2 .

It is not an unprimeable number, because it can be changed into a prime (28867515539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1001537 + ... + 1029956.

Almost surely, 2^28867515530 is an apocalyptic number.

28867515530 is an abundant number, since it is smaller than the sum of its proper divisors (33661869790).

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

28867515530 is a wasteful number, since it uses less digits than its factorization.

28867515530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031543 (or 2031536 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 50.

The spelling of 28867515530 in words is "twenty-eight billion, eight hundred sixty-seven million, five hundred fifteen thousand, five hundred thirty".