2881990 has 8 divisors (see below), whose sum is σ = 5187600. Its totient is φ = 1152792.

The previous prime is 2881951. The next prime is 2882021. The reversal of 2881990 is 991882.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144090 + ... + 144109.

It is an arithmetic number, because the mean of its divisors is an integer number (648450).

2^2881990 is an apocalyptic number.

2881990 is a deficient number, since it is larger than the sum of its proper divisors (2305610).

2881990 is a wasteful number, since it uses less digits than its factorization.

2881990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288206.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2881990 is about 1697.6424829746. The cubic root of 2881990 is about 142.3084941612.

It can be divided in two parts, 288 and 1990, that added together give a triangular number (2278 = T₆₇).

The spelling of 2881990 in words is "two million, eight hundred eighty-one thousand, nine hundred ninety".