2990391 has 16 divisors (see below), whose sum is σ = 4381440. Its totient is φ = 1805760.

The previous prime is 2990381. The next prime is 2990401. The reversal of 2990391 is 1930992.

It is an interprime number because it is at equal distance from previous prime (2990381) and next prime (2990401).

It is not a de Polignac number, because 2990391 - 2⁵ = 2990359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2990371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (273840).

2^2990391 is an apocalyptic number.

2990391 is a deficient number, since it is larger than the sum of its proper divisors (1391049).

2990391 is a wasteful number, since it uses less digits than its factorization.

2990391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 2990391 is about 1729.2747034523. The cubic root of 2990391 is about 144.0708081547.

The spelling of 2990391 in words is "two million, nine hundred ninety thousand, three hundred ninety-one".