2990905 has 8 divisors (see below), whose sum is σ = 3632832. Its totient is φ = 2363568.

The previous prime is 2990899. The next prime is 2990917. The reversal of 2990905 is 5090992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2990905 - 2⁷ = 2990777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3189 + ... + 4018.

It is an arithmetic number, because the mean of its divisors is an integer number (454104).

2^2990905 is an apocalyptic number.

It is an amenable number.

2990905 is a deficient number, since it is larger than the sum of its proper divisors (641927).

2990905 is an equidigital number, since it uses as much as digits as its factorization.

2990905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 2990905 is about 1729.4233142872. The cubic root of 2990905 is about 144.0790621648.

The spelling of 2990905 in words is "two million, nine hundred ninety thousand, nine hundred five".