3990834 has 12 divisors (see below), whose sum is σ = 8646846. Its totient is φ = 1330272.

The previous prime is 3990827. The next prime is 3990841. The reversal of 3990834 is 4380993.

It is an interprime number because it is at equal distance from previous prime (3990827) and next prime (3990841).

It can be written as a sum of positive squares in only one way, i.e., 3186225 + 804609 = 1785^2 + 897^2 .

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110839 + ... + 110874.

Almost surely, 2^3990834 is an apocalyptic number.

3990834 is an abundant number, since it is smaller than the sum of its proper divisors (4656012).

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

3990834 is a wasteful number, since it uses less digits than its factorization.

3990834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221721 (or 221718 counting only the distinct ones).

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

The square root of 3990834 is about 1997.7071857507. The cubic root of 3990834 is about 158.6187614795.

The spelling of 3990834 in words is "three million, nine hundred ninety thousand, eight hundred thirty-four".