2631090 has 128 divisors (see below), whose sum is σ = 8460288. Its totient is φ = 506880.

The previous prime is 2631077. The next prime is 2631091. The reversal of 2631090 is 901362.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2631091) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39237 + ... + 39303.

It is an arithmetic number, because the mean of its divisors is an integer number (66096).

2^2631090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2631090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4230144).

2631090 is an abundant number, since it is smaller than the sum of its proper divisors (5829198).

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

2631090 is a wasteful number, since it uses less digits than its factorization.

2631090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 2631090 is about 1622.0635006066. The cubic root of 2631090 is about 138.0528048287.

The spelling of 2631090 in words is "two million, six hundred thirty-one thousand, ninety".