28013591564 has 96 divisors (see below), whose sum is σ = 62978764800. Its totient is φ = 10627303680.

The previous prime is 28013591549. The next prime is 28013591579. The reversal of 28013591564 is 46519531082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28013591549) and next prime (28013591579).

It is a super-2 number, since 2×28013591564² (a number of 22 digits) contains 22 as substring.

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, 448982 + ... + 507554.

It is an arithmetic number, because the mean of its divisors is an integer number (656028800).

Almost surely, 2^28013591564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28013591564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31489382400).

28013591564 is an abundant number, since it is smaller than the sum of its proper divisors (34965173236).

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

28013591564 is a wasteful number, since it uses less digits than its factorization.

28013591564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58663 (or 58661 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 28013591564 in words is "twenty-eight billion, thirteen million, five hundred ninety-one thousand, five hundred sixty-four".