28251495504 has 240 divisors, whose sum is σ = 84963361600. Its totient is φ = 8736989184.

The previous prime is 28251495473. The next prime is 28251495511. The reversal of 28251495504 is 40559415282.

28251495504 is a `hidden beast` number, since 2 + 8 + 2 + 51 + 4 + 95 + 504 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28251495504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41978112 + ... + 41978784.

Almost surely, 2^28251495504 is an apocalyptic number.

28251495504 is a gapful number since it is divisible by the number (24) 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 28251495504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42481680800).

28251495504 is an abundant number, since it is smaller than the sum of its proper divisors (56711866096).

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

28251495504 is a wasteful number, since it uses less digits than its factorization.

28251495504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 28251495504 in words is "twenty-eight billion, two hundred fifty-one million, four hundred ninety-five thousand, five hundred four".