2690645 has 8 divisors (see below), whose sum is σ = 3333120. Its totient is φ = 2082960.

The previous prime is 2690629. The next prime is 2690657. The reversal of 2690645 is 5460962.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2690645 - 2⁴ = 2690629 is a prime.

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, 8525 + ... + 8834.

It is an arithmetic number, because the mean of its divisors is an integer number (416640).

2^2690645 is an apocalyptic number.

It is an amenable number.

2690645 is a deficient number, since it is larger than the sum of its proper divisors (642475).

2690645 is a wasteful number, since it uses less digits than its factorization.

2690645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17395.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2690645 is about 1640.3185666205. The cubic root of 2690645 is about 139.0866564525.

The spelling of 2690645 in words is "two million, six hundred ninety thousand, six hundred forty-five".