32399680 has 56 divisors (see below), whose sum is σ = 77980032. Its totient is φ = 12820992.

The previous prime is 32399677. The next prime is 32399687. The reversal of 32399680 is 8699323.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32399687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32469 + ... + 33451.

It is a vampire number, since it can be written as 3296 ⋅ 9830 (with its own digits).

Almost surely, 2^32399680 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 32399680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38990016).

32399680 is an abundant number, since it is smaller than the sum of its proper divisors (45580352).

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

32399680 is a wasteful number, since it uses less digits than its factorization.

32399680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 32399680 is about 5692.0716790989. The cubic root of 32399680 is about 318.7965212120.

The spelling of 32399680 in words is "thirty-two million, three hundred ninety-nine thousand, six hundred eighty".