3999798 has 24 divisors (see below), whose sum is σ = 9454536. Its totient is φ = 1212000.

The previous prime is 3999791. The next prime is 3999803. The reversal of 3999798 is 8979993.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999791) 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, 9903 + ... + 10298.

It is an arithmetic number, because the mean of its divisors is an integer number (393939).

Almost surely, 2^3999798 is an apocalyptic number.

3999798 is an abundant number, since it is smaller than the sum of its proper divisors (5454738).

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

3999798 is a wasteful number, since it uses less digits than its factorization.

3999798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20220 (or 20217 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 3999798 is about 1999.9494993624. The cubic root of 3999798 is about 158.7374330267.

The spelling of 3999798 in words is "three million, nine hundred ninety-nine thousand, seven hundred ninety-eight".