2691990 has 48 divisors (see below), whose sum is σ = 8000928. Its totient is φ = 615168.

The previous prime is 2691979. The next prime is 2692003. The reversal of 2691990 is 991962.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1507 + ... + 2766.

It is an arithmetic number, because the mean of its divisors is an integer number (166686).

2^2691990 is an apocalyptic number.

2691990 is an abundant number, since it is smaller than the sum of its proper divisors (5308938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2691990 is a wasteful number, since it uses less digits than its factorization.

2691990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293 (or 4290 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 2691990 is about 1640.7284967355. The cubic root of 2691990 is about 139.1098281443.

The spelling of 2691990 in words is "two million, six hundred ninety-one thousand, nine hundred ninety".