43978396 has 24 divisors (see below), whose sum is σ = 95953536. Its totient is φ = 17134320.

The previous prime is 43978387. The next prime is 43978397. The reversal of 43978396 is 69387934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43978397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71086 + ... + 71701.

It is an arithmetic number, because the mean of its divisors is an integer number (3998064).

Almost surely, 2^43978396 is an apocalyptic number.

It is an amenable number.

43978396 is an abundant number, since it is smaller than the sum of its proper divisors (51975140).

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

43978396 is a wasteful number, since it uses less digits than its factorization.

43978396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142809 (or 142807 counting only the distinct ones).

The product of its digits is 979776, while the sum is 49.

The square root of 43978396 is about 6631.6209179958. The cubic root of 43978396 is about 352.9770440389.

The spelling of 43978396 in words is "forty-three million, nine hundred seventy-eight thousand, three hundred ninety-six".