3991932 has 108 divisors (see below), whose sum is σ = 12282816. Its totient is φ = 1088640.

The previous prime is 3991891. The next prime is 3991943. The reversal of 3991932 is 2391993.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54648 + ... + 54720.

Almost surely, 2^3991932 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 3991932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6141408).

3991932 is an abundant number, since it is smaller than the sum of its proper divisors (8290884).

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

3991932 is a wasteful number, since it uses less digits than its factorization.

3991932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 116 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 3991932 is about 1997.9819819007. The cubic root of 3991932 is about 158.6333070966.

The spelling of 3991932 in words is "three million, nine hundred ninety-one thousand, nine hundred thirty-two".