28290057243 has 32 divisors (see below), whose sum is σ = 44069721600. Its totient is φ = 16135872480.

The previous prime is 28290057193. The next prime is 28290057251. The reversal of 28290057243 is 34275009282.

It is not a de Polignac number, because 28290057243 - 2⁸ = 28290056987 is a prime.

It is a super-2 number, since 2×28290057243² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28290057195 and 28290057204.

It is not an unprimeable number, because it can be changed into a prime (28290047243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 537733 + ... + 587993.

It is an arithmetic number, because the mean of its divisors is an integer number (1377178800).

Almost surely, 2^28290057243 is an apocalyptic number.

28290057243 is a deficient number, since it is larger than the sum of its proper divisors (15779664357).

28290057243 is an equidigital number, since it uses as much as digits as its factorization.

28290057243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50832 (or 50818 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 28290057243 in words is "twenty-eight billion, two hundred ninety million, fifty-seven thousand, two hundred forty-three".