43452640 has 96 divisors (see below), whose sum is σ = 128024064. Its totient is φ = 13539840.

The previous prime is 43452637. The next prime is 43452641. The reversal of 43452640 is 4625434.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 43452599 and 43452608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43452641) 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, 10557 + ... + 14083.

It is an arithmetic number, because the mean of its divisors is an integer number (1333584).

Almost surely, 2^43452640 is an apocalyptic number.

43452640 is a gapful number since it is divisible by the number (40) 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 43452640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64012032).

43452640 is an abundant number, since it is smaller than the sum of its proper divisors (84571424).

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

43452640 is a wasteful number, since it uses less digits than its factorization.

43452640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560 (or 3552 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 43452640 is about 6591.8616490336. The cubic root of 43452640 is about 351.5648030730.

The spelling of 43452640 in words is "forty-three million, four hundred fifty-two thousand, six hundred forty".