28400866427475 has 72 divisors (see below), whose sum is σ = 51114452932400. Its totient is φ = 15074133177600.

The previous prime is 28400866427449. The next prime is 28400866427477. The reversal of 28400866427475 is 57472466800482.

It is a happy number.

28400866427475 is a `hidden beast` number, since 2 + 8 + 4 + 0 + 0 + 86 + 64 + 27 + 475 = 666.

It is not a de Polignac number, because 28400866427475 - 2⁶ = 28400866427411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28400866427477) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 114312936 + ... + 114561114.

Almost surely, 2^{28400866427475} is an apocalyptic number.

28400866427475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28400866427475 is a deficient number, since it is larger than the sum of its proper divisors (22713586504925).

28400866427475 is a wasteful number, since it uses less digits than its factorization.

28400866427475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250645 (or 250637 counting only the distinct ones).

The product of its (nonzero) digits is 144506880, while the sum is 63.

The spelling of 28400866427475 in words is "twenty-eight trillion, four hundred billion, eight hundred sixty-six million, four hundred twenty-seven thousand, four hundred seventy-five".