3890691 has 12 divisors (see below), whose sum is σ = 6422832. Its totient is φ = 2223216.

The previous prime is 3890659. The next prime is 3890693. The reversal of 3890691 is 1960983.

It is not a de Polignac number, because 3890691 - 2⁵ = 3890659 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (3890693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30816 + ... + 30941.

It is an arithmetic number, because the mean of its divisors is an integer number (535236).

Almost surely, 2^3890691 is an apocalyptic number.

3890691 is a deficient number, since it is larger than the sum of its proper divisors (2532141).

3890691 is a wasteful number, since it uses less digits than its factorization.

3890691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61770 (or 61767 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 3890691 is about 1972.4834600067. The cubic root of 3890691 is about 157.2807531415.

Subtracting from 3890691 its sum of digits (36), we obtain a triangular number (3890655 = T₂₇₈₉).

The spelling of 3890691 in words is "three million, eight hundred ninety thousand, six hundred ninety-one".