3890631 has 4 divisors (see below), whose sum is σ = 5187512. Its totient is φ = 2593752.

The previous prime is 3890609. The next prime is 3890633. The reversal of 3890631 is 1360983.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3890631 - 2⁷ = 3890503 is a prime.

It is a super-2 number, since 2×3890631² = 30274019156322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

3890631 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3890633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648436 + ... + 648441.

It is an arithmetic number, because the mean of its divisors is an integer number (1296878).

Almost surely, 2^3890631 is an apocalyptic number.

3890631 is a deficient number, since it is larger than the sum of its proper divisors (1296881).

3890631 is a wasteful number, since it uses less digits than its factorization.

3890631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296880.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 3890631 is about 1972.4682506951. The cubic root of 3890631 is about 157.2799446396.

The spelling of 3890631 in words is "three million, eight hundred ninety thousand, six hundred thirty-one".