5390243256 has 32 divisors (see below), whose sum is σ = 13506053760. Its totient is φ = 1792688352.

The previous prime is 5390243239. The next prime is 5390243267. The reversal of 5390243256 is 6523420935.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 242860 + ... + 264123.

It is an arithmetic number, because the mean of its divisors is an integer number (422064180).

Almost surely, 2^5390243256 is an apocalyptic number.

It is an amenable number.

5390243256 is an abundant number, since it is smaller than the sum of its proper divisors (8115810504).

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

5390243256 is a wasteful number, since it uses less digits than its factorization.

5390243256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507435 (or 507431 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 5390243256 is about 73418.2760353306. The cubic root of 5390243256 is about 1753.3533802672.

The spelling of 5390243256 in words is "five billion, three hundred ninety million, two hundred forty-three thousand, two hundred fifty-six".