28191474994032 has 90 divisors (see below), whose sum is σ = 91778113981008. Its totient is φ = 8054707139136.

The previous prime is 28191474993967. The next prime is 28191474994061. The reversal of 28191474994032 is 23049947419182.

28191474994032 is a `hidden beast` number, since 2 + 8 + 1 + 9 + 1 + 474 + 99 + 40 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1997688168 + ... + 1997702279.

Almost surely, 2^{28191474994032} is an apocalyptic number.

It is an amenable number.

28191474994032 is an abundant number, since it is smaller than the sum of its proper divisors (63586638986976).

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

28191474994032 is a wasteful number, since it uses less digits than its factorization.

28191474994032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995390475 (or 3995390459 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 28191474994032 in words is "twenty-eight trillion, one hundred ninety-one billion, four hundred seventy-four million, nine hundred ninety-four thousand, thirty-two".