28511974000 has 80 divisors (see below), whose sum is σ = 70623667296. Its totient is φ = 11126592000.

The previous prime is 28511973991. The next prime is 28511974013. The reversal of 28511974000 is 47911582.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×28511974000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91854 + ... + 255853.

Almost surely, 2^28511974000 is an apocalyptic number.

28511974000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28511974000 is an abundant number, since it is smaller than the sum of its proper divisors (42111693296).

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

28511974000 is a wasteful number, since it uses less digits than its factorization.

28511974000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347771 (or 347755 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 28511974000 in words is "twenty-eight billion, five hundred eleven million, nine hundred seventy-four thousand".