28601648440 has 16 divisors (see below), whose sum is σ = 64353709080. Its totient is φ = 11440659360.

The previous prime is 28601648407. The next prime is 28601648483. The reversal of 28601648440 is 4484610682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357520566 + ... + 357520645.

Almost surely, 2^28601648440 is an apocalyptic number.

28601648440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28601648440 is an abundant number, since it is smaller than the sum of its proper divisors (35752060640).

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

28601648440 is a wasteful number, since it uses less digits than its factorization.

28601648440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715041222 (or 715041218 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 43.

The spelling of 28601648440 in words is "twenty-eight billion, six hundred one million, six hundred forty-eight thousand, four hundred forty".