2390578881 has 4 divisors (see below), whose sum is σ = 3187438512. Its totient is φ = 1593719252.

The previous prime is 2390578877. The next prime is 2390578901. The reversal of 2390578881 is 1888750932.

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 2390578881 - 2² = 2390578877 is a prime.

It is a super-2 number, since 2×2390578881² = 11429734772566424322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2390578381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398429811 + ... + 398429816.

It is an arithmetic number, because the mean of its divisors is an integer number (796859628).

Almost surely, 2^2390578881 is an apocalyptic number.

It is an amenable number.

2390578881 is a deficient number, since it is larger than the sum of its proper divisors (796859631).

2390578881 is an equidigital number, since it uses as much as digits as its factorization.

2390578881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796859630.

The product of its (nonzero) digits is 967680, while the sum is 51.

The square root of 2390578881 is about 48893.5464146343. The cubic root of 2390578881 is about 1337.1117118543. Note that the first 3 decimals are identical.

The spelling of 2390578881 in words is "two billion, three hundred ninety million, five hundred seventy-eight thousand, eight hundred eighty-one".