32381240 has 64 divisors (see below), whose sum is σ = 77405760. Its totient is φ = 12165120.

The previous prime is 32381227. The next prime is 32381269. The reversal of 32381240 is 4218323.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55832 + ... + 56408.

It is an arithmetic number, because the mean of its divisors is an integer number (1209465).

Almost surely, 2^32381240 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 32381240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38702880).

32381240 is an abundant number, since it is smaller than the sum of its proper divisors (45024520).

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

32381240 is a wasteful number, since it uses less digits than its factorization.

32381240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 32381240 is about 5690.4516516705. The cubic root of 32381240 is about 318.7360296325.

Adding to 32381240 its reverse (4218323), we get a palindrome (36599563).

The spelling of 32381240 in words is "thirty-two million, three hundred eighty-one thousand, two hundred forty".