2631380 has 24 divisors (see below), whose sum is σ = 5662440. Its totient is φ = 1026560.

The previous prime is 2631347. The next prime is 2631401. The reversal of 2631380 is 831362.

It can be written as a sum of positive squares in 4 ways, for example, as 13456 + 2617924 = 116^2 + 1618^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785 + ... + 2424.

It is an arithmetic number, because the mean of its divisors is an integer number (235935).

2^2631380 is an apocalyptic number.

2631380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2631380 is an abundant number, since it is smaller than the sum of its proper divisors (3031060).

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

2631380 is a wasteful number, since it uses less digits than its factorization.

2631380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259 (or 3257 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2631380 is about 1622.1528904515. The cubic root of 2631380 is about 138.0578767245.

The spelling of 2631380 in words is "two million, six hundred thirty-one thousand, three hundred eighty".