3870440 has 64 divisors (see below), whose sum is σ = 10402560. Its totient is φ = 1267200.

The previous prime is 3870439. The next prime is 3870457. The reversal of 3870440 is 440783.

It is a hoax number, since the sum of its digits (26) 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 15 ways as a sum of consecutive naturals, for example, 6140 + ... + 6740.

It is an arithmetic number, because the mean of its divisors is an integer number (162540).

Almost surely, 2^3870440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3870440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5201280).

3870440 is an abundant number, since it is smaller than the sum of its proper divisors (6532120).

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

3870440 is a wasteful number, since it uses less digits than its factorization.

3870440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 3870440 is about 1967.3433863970. The cubic root of 3870440 is about 157.0073968414.

The spelling of 3870440 in words is "three million, eight hundred seventy thousand, four hundred forty".