2635668 has 36 divisors (see below), whose sum is σ = 7614880. Its totient is φ = 752976.

The previous prime is 2635643. The next prime is 2635673. The reversal of 2635668 is 8665362.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4978 + ... + 5481.

2^2635668 is an apocalyptic number.

2635668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2635668 is an abundant number, since it is smaller than the sum of its proper divisors (4979212).

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

2635668 is a wasteful number, since it uses less digits than its factorization.

2635668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10476 (or 10471 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2635668 is about 1623.4740527646. The cubic root of 2635668 is about 138.1328273719.

The spelling of 2635668 in words is "two million, six hundred thirty-five thousand, six hundred sixty-eight".