2956890381 has 4 divisors (see below), whose sum is σ = 3942520512. Its totient is φ = 1971260252.

The previous prime is 2956890361. The next prime is 2956890389. The reversal of 2956890381 is 1830986592.

It is a happy number.

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 2956890381 - 2¹⁹ = 2956366093 is a prime.

It is a super-2 number, since 2×2956890381² = 17486401450500650322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2956890389) 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, 492815061 + ... + 492815066.

It is an arithmetic number, because the mean of its divisors is an integer number (985630128).

Almost surely, 2^2956890381 is an apocalyptic number.

It is an amenable number.

2956890381 is a deficient number, since it is larger than the sum of its proper divisors (985630131).

2956890381 is an equidigital number, since it uses as much as digits as its factorization.

2956890381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985630130.

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 2956890381 is about 54377.2965583983. The cubic root of 2956890381 is about 1435.3078986593.

The spelling of 2956890381 in words is "two billion, nine hundred fifty-six million, eight hundred ninety thousand, three hundred eighty-one".