32396991 has 16 divisors (see below), whose sum is σ = 47303040. Its totient is φ = 19559520.

The previous prime is 32396989. The next prime is 32397007. The reversal of 32396991 is 19969323.

It is a happy number.

It is not a de Polignac number, because 32396991 - 2¹ = 32396989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32396971) 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, 7605 + ... + 11073.

It is an arithmetic number, because the mean of its divisors is an integer number (2956440).

Almost surely, 2^32396991 is an apocalyptic number.

32396991 is a deficient number, since it is larger than the sum of its proper divisors (14906049).

32396991 is a wasteful number, since it uses less digits than its factorization.

32396991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766.

The product of its digits is 78732, while the sum is 42.

The square root of 32396991 is about 5691.8354684583. The cubic root of 32396991 is about 318.7877014998.

The spelling of 32396991 in words is "thirty-two million, three hundred ninety-six thousand, nine hundred ninety-one".