2631720 has 128 divisors (see below), whose sum is σ = 9757440. Its totient is φ = 552960.

The previous prime is 2631701. The next prime is 2631731. The reversal of 2631720 is 271362.

It is a happy number.

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

2631720 is an undulating number in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10800 + ... + 11040.

It is an arithmetic number, because the mean of its divisors is an integer number (76230).

2^2631720 is an apocalyptic number.

2631720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2631720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4878720).

2631720 is an abundant number, since it is smaller than the sum of its proper divisors (7125720).

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

2631720 is a wasteful number, since it uses less digits than its factorization.

2631720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 2631720 is about 1622.2576860659. The cubic root of 2631720 is about 138.0638226105.

The spelling of 2631720 in words is "two million, six hundred thirty-one thousand, seven hundred twenty".