43398432 has 288 divisors, whose sum is σ = 163537920. Its totient is φ = 10575360.

The previous prime is 43398409. The next prime is 43398461. The reversal of 43398432 is 23489334.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 421293 + ... + 421395.

It is an arithmetic number, because the mean of its divisors is an integer number (567840).

Almost surely, 2^43398432 is an apocalyptic number.

43398432 is a gapful number since it is divisible by the number (42) 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 43398432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81768960).

43398432 is an abundant number, since it is smaller than the sum of its proper divisors (120139488).

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

43398432 is a wasteful number, since it uses less digits than its factorization.

43398432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 145 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 43398432 is about 6587.7486290841. The cubic root of 43398432 is about 351.4185476306.

The spelling of 43398432 in words is "forty-three million, three hundred ninety-eight thousand, four hundred thirty-two".