3947832 has 96 divisors (see below), whose sum is σ = 12790800. Its totient is φ = 1124928.

The previous prime is 3947831. The next prime is 3947833. The reversal of 3947832 is 2387493.

It is an interprime number because it is at equal distance from previous prime (3947831) and next prime (3947833).

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 not an unprimeable number, because it can be changed into a prime (3947831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10398 + ... + 10770.

Almost surely, 2^3947832 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 3947832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6395400).

3947832 is an abundant number, since it is smaller than the sum of its proper divisors (8842968).

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

3947832 is a wasteful number, since it uses less digits than its factorization.

3947832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 385 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 3947832 is about 1986.9151969825. The cubic root of 3947832 is about 158.0469870401.

The spelling of 3947832 in words is "three million, nine hundred forty-seven thousand, eight hundred thirty-two".