3990798 has 48 divisors (see below), whose sum is σ = 10408320. Its totient is φ = 1079568.

The previous prime is 3990773. The next prime is 3990827. The reversal of 3990798 is 8970993.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1561 + ... + 3227.

It is an arithmetic number, because the mean of its divisors is an integer number (216840).

Almost surely, 2^3990798 is an apocalyptic number.

3990798 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3990798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5204160).

3990798 is an abundant number, since it is smaller than the sum of its proper divisors (6417522).

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

3990798 is a wasteful number, since it uses less digits than its factorization.

3990798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 3990798 is about 1997.6981754009. The cubic root of 3990798 is about 158.6182845289.

The spelling of 3990798 in words is "three million, nine hundred ninety thousand, seven hundred ninety-eight".