2390382981 has 56 divisors (see below), whose sum is σ = 4112967744. Its totient is φ = 1360255680.

The previous prime is 2390382979. The next prime is 2390382991. The reversal of 2390382981 is 1892830932.

2390382981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2390382981 - 2¹ = 2390382979 is a prime.

It is a super-2 number, since 2×2390382981² = 11427861591708892722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2390382961) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1433110 + ... + 1434776.

Almost surely, 2^2390382981 is an apocalyptic number.

2390382981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2390382981 is a deficient number, since it is larger than the sum of its proper divisors (1722584763).

2390382981 is an equidigital number, since it uses as much as digits as its factorization.

2390382981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1958 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 2390382981 is about 48891.5430417163. The cubic root of 2390382981 is about 1337.0751869019.

The spelling of 2390382981 in words is "two billion, three hundred ninety million, three hundred eighty-two thousand, nine hundred eighty-one".