43917940 has 48 divisors (see below), whose sum is σ = 101787840. Its totient is φ = 15783680.

The previous prime is 43917901. The next prime is 43917943. The reversal of 43917940 is 4971934.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 43917940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43917943) 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, 18459 + ... + 20701.

It is an arithmetic number, because the mean of its divisors is an integer number (2120580).

Almost surely, 2^43917940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43917940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50893920).

43917940 is an abundant number, since it is smaller than the sum of its proper divisors (57869900).

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

43917940 is a wasteful number, since it uses less digits than its factorization.

43917940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352 (or 2350 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 43917940 is about 6627.0611887925. The cubic root of 43917940 is about 352.8152269657.

The spelling of 43917940 in words is "forty-three million, nine hundred seventeen thousand, nine hundred forty".