28257408942 has 32 divisors (see below), whose sum is σ = 68387680512. Its totient is φ = 7598630784.

The previous prime is 28257408923. The next prime is 28257408967. The reversal of 28257408942 is 24980475282.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19787388 + ... + 19788815.

It is an arithmetic number, because the mean of its divisors is an integer number (2137115016).

Almost surely, 2^28257408942 is an apocalyptic number.

28257408942 is an abundant number, since it is smaller than the sum of its proper divisors (40130271570).

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

28257408942 is a wasteful number, since it uses less digits than its factorization.

28257408942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39576232.

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 28257408942 in words is "twenty-eight billion, two hundred fifty-seven million, four hundred eight thousand, nine hundred forty-two".