2641990 has 16 divisors (see below), whose sum is σ = 5121648. Its totient is φ = 975456.

The previous prime is 2641949. The next prime is 2641993. The reversal of 2641990 is 991462.

2641990 = T₂₅₂ + T₂₅₃ + ... + T₃₁₆.

It is a happy number.

It is a super-2 number, since 2×2641990² = 13960222320200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10032 + ... + 10291.

It is an arithmetic number, because the mean of its divisors is an integer number (320103).

2^2641990 is an apocalyptic number.

2641990 is a deficient number, since it is larger than the sum of its proper divisors (2479658).

2641990 is a wasteful number, since it uses less digits than its factorization.

2641990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20343.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2641990 is about 1625.4199457371. The cubic root of 2641990 is about 138.2431825002.

The spelling of 2641990 in words is "two million, six hundred forty-one thousand, nine hundred ninety".