32445240 has 64 divisors (see below), whose sum is σ = 98336160. Its totient is φ = 8563200.

The previous prime is 32445233. The next prime is 32445247. The reversal of 32445240 is 4254423.

It is an interprime number because it is at equal distance from previous prime (32445233) and next prime (32445247).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 32445240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32445247) 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, 10782 + ... + 13458.

Almost surely, 2^32445240 is an apocalyptic number.

32445240 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 32445240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49168080).

32445240 is an abundant number, since it is smaller than the sum of its proper divisors (65890920).

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

32445240 is a wasteful number, since it uses less digits than its factorization.

32445240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792 (or 2788 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 32445240 is about 5696.0723310014. The cubic root of 32445240 is about 318.9458803706.

Adding to 32445240 its reverse (4254423), we get a palindrome (36699663).

The spelling of 32445240 in words is "thirty-two million, four hundred forty-five thousand, two hundred forty".