2661628 has 12 divisors (see below), whose sum is σ = 4669560. Its totient is φ = 1327472.

The previous prime is 2661611. The next prime is 2661641. The reversal of 2661628 is 8261662.

It is a super-2 number, since 2×2661628² = 14168527220768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2661628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2103 + ... + 3121.

It is an arithmetic number, because the mean of its divisors is an integer number (389130).

2^2661628 is an apocalyptic number.

It is an amenable number.

2661628 is a deficient number, since it is larger than the sum of its proper divisors (2007932).

2661628 is a wasteful number, since it uses less digits than its factorization.

2661628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676 (or 1674 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 2661628 is about 1631.4496621104. The cubic root of 2661628 is about 138.5848593939.

The spelling of 2661628 in words is "two million, six hundred sixty-one thousand, six hundred twenty-eight".