3970638 has 24 divisors (see below), whose sum is σ = 9832368. Its totient is φ = 1134432.

The previous prime is 3970633. The next prime is 3970643. The reversal of 3970638 is 8360793.

It is an interprime number because it is at equal distance from previous prime (3970633) and next prime (3970643).

It is a super-2 number, since 2×3970638² = 31531932254088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3970633) 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, 15631 + ... + 15882.

It is an arithmetic number, because the mean of its divisors is an integer number (409682).

Almost surely, 2^3970638 is an apocalyptic number.

3970638 is an abundant number, since it is smaller than the sum of its proper divisors (5861730).

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

3970638 is a wasteful number, since it uses less digits than its factorization.

3970638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31528 (or 31525 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 3970638 is about 1992.6459795960. The cubic root of 3970638 is about 158.3507403454.

The spelling of 3970638 in words is "three million, nine hundred seventy thousand, six hundred thirty-eight".