2631390 has 32 divisors (see below), whose sum is σ = 6359040. Its totient is φ = 696864.

The previous prime is 2631347. The next prime is 2631401. The reversal of 2631390 is 931362.

2631390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2631390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6987 + ... + 7353.

It is an arithmetic number, because the mean of its divisors is an integer number (198720).

2^2631390 is an apocalyptic number.

2631390 is an abundant number, since it is smaller than the sum of its proper divisors (3727650).

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

2631390 is a wasteful number, since it uses less digits than its factorization.

2631390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 2631390 is about 1622.1559727720. The cubic root of 2631390 is about 138.0580516108.

Adding to 2631390 its product of nonzero digits (972), we get a palindrome (2632362).

It can be divided in two parts, 263 and 1390, that added together give a triangular number (1653 = T₅₇).

The spelling of 2631390 in words is "two million, six hundred thirty-one thousand, three hundred ninety".