28320626464 has 48 divisors (see below), whose sum is σ = 60606439488. Its totient is φ = 12948878592.

The previous prime is 28320626459. The next prime is 28320626471. The reversal of 28320626464 is 46462602382.

It is a super-3 number, since 3×28320626464³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28320626464.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273612 + ... + 362635.

It is an arithmetic number, because the mean of its divisors is an integer number (1262634156).

Almost surely, 2^28320626464 is an apocalyptic number.

It is an amenable number.

28320626464 is an abundant number, since it is smaller than the sum of its proper divisors (32285813024).

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

28320626464 is a wasteful number, since it uses less digits than its factorization.

28320626464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636377 (or 636369 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 28320626464 in words is "twenty-eight billion, three hundred twenty million, six hundred twenty-six thousand, four hundred sixty-four".