28390611456 has 480 divisors, whose sum is σ = 93087042048. Its totient is φ = 8599633920.

The previous prime is 28390611443. The next prime is 28390611479. The reversal of 28390611456 is 65411609382.

28390611456 is a `hidden beast` number, since 28 + 3 + 9 + 0 + 611 + 4 + 5 + 6 = 666.

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, 65567016 + ... + 65567448.

Almost surely, 2^28390611456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28390611456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46543521024).

28390611456 is an abundant number, since it is smaller than the sum of its proper divisors (64696430592).

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

28390611456 is an equidigital number, since it uses as much as digits as its factorization.

28390611456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 28390611456 in words is "twenty-eight billion, three hundred ninety million, six hundred eleven thousand, four hundred fifty-six".