43978492 has 12 divisors (see below), whose sum is σ = 77104440. Its totient is φ = 21948656.

The previous prime is 43978457. The next prime is 43978513. The reversal of 43978492 is 29487934.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7642 + ... + 12097.

It is an arithmetic number, because the mean of its divisors is an integer number (6425370).

Almost surely, 2^43978492 is an apocalyptic number.

It is an amenable number.

43978492 is a deficient number, since it is larger than the sum of its proper divisors (33125948).

43978492 is a wasteful number, since it uses less digits than its factorization.

43978492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20300 (or 20298 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 43978492 is about 6631.6281560413. The cubic root of 43978492 is about 352.9773008754.

The spelling of 43978492 in words is "forty-three million, nine hundred seventy-eight thousand, four hundred ninety-two".