3991532 has 12 divisors (see below), whose sum is σ = 7396200. Its totient is φ = 1878336.

The previous prime is 3991517. The next prime is 3991543. The reversal of 3991532 is 2351993.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29282 + ... + 29417.

It is an arithmetic number, because the mean of its divisors is an integer number (616350).

Almost surely, 2^3991532 is an apocalyptic number.

It is an amenable number.

3991532 is a deficient number, since it is larger than the sum of its proper divisors (3404668).

3991532 is a wasteful number, since it uses less digits than its factorization.

3991532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58720 (or 58718 counting only the distinct ones).

The product of its digits is 7290, while the sum is 32.

The square root of 3991532 is about 1997.8818783902. The cubic root of 3991532 is about 158.6280084557.

It can be divided in two parts, 3991 and 532, that multiplied together give a palindrome (2123212).

The spelling of 3991532 in words is "three million, nine hundred ninety-one thousand, five hundred thirty-two".