3261690 has 24 divisors (see below), whose sum is σ = 8480628. Its totient is φ = 869760.

The previous prime is 3261683. The next prime is 3261703. The reversal of 3261690 is 961623.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2712609 + 549081 = 1647^2 + 741^2 .

It is a super-2 number, since 2×3261690² = 21277243312200, which contains 22 as substring.

It is an Ulam number.

It is a Curzon 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, 18031 + ... + 18210.

Almost surely, 2^3261690 is an apocalyptic number.

3261690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3261690 is an abundant number, since it is smaller than the sum of its proper divisors (5218938).

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

3261690 is a wasteful number, since it uses less digits than its factorization.

3261690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36254 (or 36251 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3261690 is about 1806.0149501042. The cubic root of 3261690 is about 148.3021887508.

It can be divided in two parts, 326 and 1690, that added together give a triangular number (2016 = T₆₃).

The spelling of 3261690 in words is "three million, two hundred sixty-one thousand, six hundred ninety".