28408264860 has 96 divisors (see below), whose sum is σ = 83635272000. Its totient is φ = 7194378240.

The previous prime is 28408264837. The next prime is 28408264883. The reversal of 28408264860 is 6846280482.

It is an interprime number because it is at equal distance from previous prime (28408264837) and next prime (28408264883).

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, 27685 + ... + 239964.

It is an arithmetic number, because the mean of its divisors is an integer number (871200750).

Almost surely, 2^28408264860 is an apocalyptic number.

28408264860 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 28408264860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41817636000).

28408264860 is an abundant number, since it is smaller than the sum of its proper divisors (55227007140).

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

28408264860 is a wasteful number, since it uses less digits than its factorization.

28408264860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267751 (or 267749 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 48.

The spelling of 28408264860 in words is "twenty-eight billion, four hundred eight million, two hundred sixty-four thousand, eight hundred sixty".