28290057242 has 4 divisors (see below), whose sum is σ = 42435085866. Its totient is φ = 14145028620.

The previous prime is 28290057193. The next prime is 28290057251. The reversal of 28290057242 is 24275009282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24275009282 = 2 ⋅12137504641.

It can be written as a sum of positive squares in only one way, i.e., 21488921281 + 6801135961 = 146591^2 + 82469^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28290057242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7072514309 + ... + 7072514312.

Almost surely, 2^28290057242 is an apocalyptic number.

28290057242 is a deficient number, since it is larger than the sum of its proper divisors (14145028624).

28290057242 is a wasteful number, since it uses less digits than its factorization.

28290057242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14145028623.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 28290057242 in words is "twenty-eight billion, two hundred ninety million, fifty-seven thousand, two hundred forty-two".