32457240 has 128 divisors (see below), whose sum is σ = 110980800. Its totient is φ = 8432640.

The previous prime is 32457223. The next prime is 32457277. The reversal of 32457240 is 4275423.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 43914 + ... + 44646.

Almost surely, 2^32457240 is an apocalyptic number.

32457240 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 32457240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55490400).

32457240 is an abundant number, since it is smaller than the sum of its proper divisors (78523560).

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

32457240 is a wasteful number, since it uses less digits than its factorization.

32457240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 32457240 is about 5697.1255910327. The cubic root of 32457240 is about 318.9851966545.

The spelling of 32457240 in words is "thirty-two million, four hundred fifty-seven thousand, two hundred forty".