32397840 has 160 divisors (see below), whose sum is σ = 114099840. Its totient is φ = 8446464.

The previous prime is 32397773. The next prime is 32397851. The reversal of 32397840 is 4879323.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 32397795 and 32397804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114339 + ... + 114621.

It is an arithmetic number, because the mean of its divisors is an integer number (713124).

Almost surely, 2^32397840 is an apocalyptic number.

32397840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32397840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57049920).

32397840 is an abundant number, since it is smaller than the sum of its proper divisors (81702000).

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

32397840 is a wasteful number, since it uses less digits than its factorization.

32397840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 346 counting only the distinct ones).

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

The square root of 32397840 is about 5691.9100484811. The cubic root of 32397840 is about 318.7904862069.

The spelling of 32397840 in words is "thirty-two million, three hundred ninety-seven thousand, eight hundred forty".