3865540 has 24 divisors (see below), whose sum is σ = 9277632. Its totient is φ = 1325280.

The previous prime is 3865529. The next prime is 3865553. The reversal of 3865540 is 455683.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 13666 + ... + 13945.

It is an arithmetic number, because the mean of its divisors is an integer number (386568).

Almost surely, 2^3865540 is an apocalyptic number.

It is an amenable number.

3865540 is an abundant number, since it is smaller than the sum of its proper divisors (5412092).

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

3865540 is a wasteful number, since it uses less digits than its factorization.

3865540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27627 (or 27625 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 3865540 is about 1966.0976577983. The cubic root of 3865540 is about 156.9411114290.

The spelling of 3865540 in words is "three million, eight hundred sixty-five thousand, five hundred forty".