3999632 has 80 divisors (see below), whose sum is σ = 9916032. Its totient is φ = 1520640.

The previous prime is 3999629. The next prime is 3999637. The reversal of 3999632 is 2369993.

It is a happy number.

It is a super-2 number, since 2×3999632² = 31994112270848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 3999632.

It is not an unprimeable number, because it can be changed into a prime (3999637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59663 + ... + 59729.

Almost surely, 2^3999632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4958016).

3999632 is an abundant number, since it is smaller than the sum of its proper divisors (5916400).

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

3999632 is a wasteful number, since it uses less digits than its factorization.

3999632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 130 counting only the distinct ones).

The product of its digits is 78732, while the sum is 41.

The square root of 3999632 is about 1999.9079978839. The cubic root of 3999632 is about 158.7352370176.

The spelling of 3999632 in words is "three million, nine hundred ninety-nine thousand, six hundred thirty-two".