3981632 has 14 divisors (see below), whose sum is σ = 7901178. Its totient is φ = 1990784.

The previous prime is 3981629. The next prime is 3981641. The reversal of 3981632 is 2361893.

It can be written as a sum of positive squares in only one way, i.e., 2383936 + 1597696 = 1544^2 + 1264^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31043 + ... + 31170.

Almost surely, 2^3981632 is an apocalyptic number.

3981632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3981632 is a deficient number, since it is larger than the sum of its proper divisors (3919546).

3981632 is an equidigital number, since it uses as much as digits as its factorization.

3981632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62225 (or 62215 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 3981632 is about 1995.4027162455. The cubic root of 3981632 is about 158.4967541388.

The spelling of 3981632 in words is "three million, nine hundred eighty-one thousand, six hundred thirty-two".