28831400257 has 8 divisors (see below), whose sum is σ = 33302580192. Its totient is φ = 24668577600.

The previous prime is 28831400233. The next prime is 28831400267. The reversal of 28831400257 is 75200413882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28831400257 - 2¹⁵ = 28831367489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28831400267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77089119 + ... + 77089492.

It is an arithmetic number, because the mean of its divisors is an integer number (4162822524).

Almost surely, 2^28831400257 is an apocalyptic number.

It is an amenable number.

28831400257 is a deficient number, since it is larger than the sum of its proper divisors (4471179935).

28831400257 is a wasteful number, since it uses less digits than its factorization.

28831400257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154178639.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 28831400257 in words is "twenty-eight billion, eight hundred thirty-one million, four hundred thousand, two hundred fifty-seven".