2721630 has 32 divisors (see below), whose sum is σ = 6575904. Its totient is φ = 720896.

The previous prime is 2721619. The next prime is 2721671. The reversal of 2721630 is 361272.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2721597 and 2721606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7534 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (205497).

2^2721630 is an apocalyptic number.

2721630 is an abundant number, since it is smaller than the sum of its proper divisors (3854274).

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

2721630 is a wasteful number, since it uses less digits than its factorization.

2721630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

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

The square root of 2721630 is about 1649.7363425711. The cubic root of 2721630 is about 139.6185192849.

The spelling of 2721630 in words is "two million, seven hundred twenty-one thousand, six hundred thirty".