28370477520 has 480 divisors, whose sum is σ = 119179157760. Its totient is φ = 5875752960.

The previous prime is 28370477501. The next prime is 28370477543. The reversal of 28370477520 is 2577407382.

28370477520 is a `hidden beast` number, since 2 + 83 + 7 + 0 + 47 + 7 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22009036 + ... + 22010324.

It is an arithmetic number, because the mean of its divisors is an integer number (248289912).

Almost surely, 2^28370477520 is an apocalyptic number.

28370477520 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 28370477520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59589578880).

28370477520 is an abundant number, since it is smaller than the sum of its proper divisors (90808680240).

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

28370477520 is a wasteful number, since it uses less digits than its factorization.

28370477520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723 (or 1714 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 45.

The spelling of 28370477520 in words is "twenty-eight billion, three hundred seventy million, four hundred seventy-seven thousand, five hundred twenty".