3894390 has 24 divisors (see below), whose sum is σ = 10125648. Its totient is φ = 1038480.

The previous prime is 3894353. The next prime is 3894391. The reversal of 3894390 is 934983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3894391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21546 + ... + 21725.

It is an arithmetic number, because the mean of its divisors is an integer number (421902).

Almost surely, 2^3894390 is an apocalyptic number.

3894390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3894390 is an abundant number, since it is smaller than the sum of its proper divisors (6231258).

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

3894390 is a wasteful number, since it uses less digits than its factorization.

3894390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43284 (or 43281 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3894390 is about 1973.4208876973. The cubic root of 3894390 is about 157.3305812424.

The spelling of 3894390 in words is "three million, eight hundred ninety-four thousand, three hundred ninety".