3999996 has 192 divisors, whose sum is σ = 14300160. Its totient is φ = 933120.

The previous prime is 3999971. The next prime is 4000037. The reversal of 3999996 is 6999993.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (1062882) is a multiple of the sum of its prime factors (81).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108090 + ... + 108126.

It is an arithmetic number, because the mean of its divisors is an integer number (74480).

Almost surely, 2^3999996 is an apocalyptic number.

3999996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7150080).

3999996 is an abundant number, since it is smaller than the sum of its proper divisors (10300164).

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

3999996 is a wasteful number, since it uses less digits than its factorization.

3999996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 73 counting only the distinct ones).

The product of its digits is 1062882, while the sum is 54.

The square root of 3999996 is about 1999.9989999997. The cubic root of 3999996 is about 158.7400522834.

It can be divided in two parts, 3 and 999996, that added together give a palindrome (999999).

The spelling of 3999996 in words is "three million, nine hundred ninety-nine thousand, nine hundred ninety-six".