28626057720 has 320 divisors, whose sum is σ = 104139937440. Its totient is φ = 7010841600.

The previous prime is 28626057703. The next prime is 28626057743. The reversal of 28626057720 is 2775062682.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8885710 + ... + 8888930.

Almost surely, 2^28626057720 is an apocalyptic number.

28626057720 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 28626057720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52069968720).

28626057720 is an abundant number, since it is smaller than the sum of its proper divisors (75513879720).

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

28626057720 is a wasteful number, since it uses less digits than its factorization.

28626057720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468 (or 3455 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 28626057720 in words is "twenty-eight billion, six hundred twenty-six million, fifty-seven thousand, seven hundred twenty".