3895640 has 32 divisors (see below), whose sum is σ = 10018080. Its totient is φ = 1335552.

The previous prime is 3895603. The next prime is 3895667. The reversal of 3895640 is 465983.

3895640 = 743² + 744² + ... + 749².

It is a super-2 number, since 2×3895640² = 30352022019200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 3895640.

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, 6677 + ... + 7236.

It is an arithmetic number, because the mean of its divisors is an integer number (313065).

Almost surely, 2^3895640 is an apocalyptic number.

It is an amenable number.

3895640 is an abundant number, since it is smaller than the sum of its proper divisors (6122440).

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

3895640 is a wasteful number, since it uses less digits than its factorization.

3895640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13931 (or 13927 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 3895640 is about 1973.7375712085. The cubic root of 3895640 is about 157.3474124781.

The spelling of 3895640 in words is "three million, eight hundred ninety-five thousand, six hundred forty".