28057185400 has 24 divisors (see below), whose sum is σ = 65232956520. Its totient is φ = 11222874080.

The previous prime is 28057185383. The next prime is 28057185413. The reversal of 28057185400 is 458175082.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70142764 + ... + 70143163.

It is an arithmetic number, because the mean of its divisors is an integer number (2718039855).

Almost surely, 2^28057185400 is an apocalyptic number.

28057185400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28057185400 is an abundant number, since it is smaller than the sum of its proper divisors (37175771120).

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

28057185400 is a wasteful number, since it uses less digits than its factorization.

28057185400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140285943 (or 140285934 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The spelling of 28057185400 in words is "twenty-eight billion, fifty-seven million, one hundred eighty-five thousand, four hundred".