28897270480 has 80 divisors (see below), whose sum is σ = 76610502864. Its totient is φ = 10042122240.

The previous prime is 28897270453. The next prime is 28897270547. The reversal of 28897270480 is 8407279882.

It can be written as a sum of positive squares in 8 ways, for example, as 1147041424 + 27750229056 = 33868^2 + 166584^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799551 + ... + 834910.

Almost surely, 2^28897270480 is an apocalyptic number.

28897270480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28897270480 is an abundant number, since it is smaller than the sum of its proper divisors (47713232384).

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

28897270480 is a wasteful number, since it uses less digits than its factorization.

28897270480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634504 (or 1634498 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 28897270480 in words is "twenty-eight billion, eight hundred ninety-seven million, two hundred seventy thousand, four hundred eighty".