28776002046920 has 256 divisors, whose sum is σ = 69321237289920. Its totient is φ = 10713091276800.

The previous prime is 28776002046881. The next prime is 28776002046931. The reversal of 28776002046920 is 2964020067782.

It can be written as a sum of positive squares in 32 ways, for example, as 13378900967524 + 15397101079396 = 3657718^2 + 3923914^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16720511660 + ... + 16720513380.

Almost surely, 2^{28776002046920} is an apocalyptic number.

28776002046920 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 28776002046920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34660618644960).

28776002046920 is an abundant number, since it is smaller than the sum of its proper divisors (40545235243000).

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

28776002046920 is a wasteful number, since it uses less digits than its factorization.

28776002046920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644 (or 2640 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 28776002046920 in words is "twenty-eight trillion, seven hundred seventy-six billion, two million, forty-six thousand, nine hundred twenty".