28877195520 has 576 divisors, whose sum is σ = 113272266240. Its totient is φ = 6929252352.

The previous prime is 28877195509. The next prime is 28877195521. The reversal of 28877195520 is 2559177882.

28877195520 is a `hidden beast` number, since 2 + 8 + 8 + 77 + 19 + 552 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×28877195520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28877195521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13511892 + ... + 13514028.

It is an arithmetic number, because the mean of its divisors is an integer number (196653240).

Almost surely, 2^28877195520 is an apocalyptic number.

28877195520 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 28877195520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56636133120).

28877195520 is an abundant number, since it is smaller than the sum of its proper divisors (84395070720).

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

28877195520 is a wasteful number, since it uses less digits than its factorization.

28877195520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207 (or 2187 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 28877195520 in words is "twenty-eight billion, eight hundred seventy-seven million, one hundred ninety-five thousand, five hundred twenty".