3890641 has 4 divisors (see below), whose sum is σ = 3954484. Its totient is φ = 3826800.

The previous prime is 3890639. The next prime is 3890651. The reversal of 3890641 is 1460983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1460983 = 23 ⋅63521.

It can be written as a sum of positive squares in 2 ways, for example, as 863041 + 3027600 = 929^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 3890641 - 2¹ = 3890639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3890651) 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, 31830 + ... + 31951.

It is an arithmetic number, because the mean of its divisors is an integer number (988621).

Almost surely, 2^3890641 is an apocalyptic number.

3890641 is the 1248-th centered pentagonal number.

It is an amenable number.

3890641 is a deficient number, since it is larger than the sum of its proper divisors (63843).

3890641 is an equidigital number, since it uses as much as digits as its factorization.

3890641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63842.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 3890641 is about 1972.4707855885. The cubic root of 3890641 is about 157.2800793905.

The spelling of 3890641 in words is "three million, eight hundred ninety thousand, six hundred forty-one".