2390140257 has 4 divisors (see below), whose sum is σ = 3186853680. Its totient is φ = 1593426836.

The previous prime is 2390140253. The next prime is 2390140267. The reversal of 2390140257 is 7520410932.

2390140257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2390140257 - 2² = 2390140253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2390140253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398356707 + ... + 398356712.

It is an arithmetic number, because the mean of its divisors is an integer number (796713420).

Almost surely, 2^2390140257 is an apocalyptic number.

It is an amenable number.

2390140257 is a deficient number, since it is larger than the sum of its proper divisors (796713423).

2390140257 is an equidigital number, since it uses as much as digits as its factorization.

2390140257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796713422.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 2390140257 is about 48889.0607089152. The cubic root of 2390140257 is about 1337.0299289906.

The spelling of 2390140257 in words is "two billion, three hundred ninety million, one hundred forty thousand, two hundred fifty-seven".