43978032 has 80 divisors (see below), whose sum is σ = 144276480. Its totient is φ = 12564288.

The previous prime is 43978009. The next prime is 43978037. The reversal of 43978032 is 23087934.

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

It is not an unprimeable number, because it can be changed into a prime (43978037) 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, 4248 + ... + 10295.

It is an arithmetic number, because the mean of its divisors is an integer number (1803456).

Almost surely, 2^43978032 is an apocalyptic number.

43978032 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

43978032 is an abundant number, since it is smaller than the sum of its proper divisors (100298448).

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

43978032 is a wasteful number, since it uses less digits than its factorization.

43978032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14567 (or 14555 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 43978032 is about 6631.5934736683. The cubic root of 43978032 is about 352.9760701972.

The spelling of 43978032 in words is "forty-three million, nine hundred seventy-eight thousand, thirty-two".