28347550431 has 16 divisors (see below), whose sum is σ = 39155931360. Its totient is φ = 18220630400.

The previous prime is 28347550421. The next prime is 28347550433. The reversal of 28347550431 is 13405574382.

It is not a de Polignac number, because 28347550431 - 2¹⁰ = 28347549407 is a prime.

It is a super-2 number, since 2×28347550431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28347550433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171420 + ... + 293393.

It is an arithmetic number, because the mean of its divisors is an integer number (2447245710).

Almost surely, 2^28347550431 is an apocalyptic number.

28347550431 is a deficient number, since it is larger than the sum of its proper divisors (10808380929).

28347550431 is a wasteful number, since it uses less digits than its factorization.

28347550431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465546.

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 28347550431 in words is "twenty-eight billion, three hundred forty-seven million, five hundred fifty thousand, four hundred thirty-one".