43957940 has 24 divisors (see below), whose sum is σ = 99413160. Its totient is φ = 16230528.

The previous prime is 43957931. The next prime is 43957973. The reversal of 43957940 is 4975934.

It can be written as a sum of positive squares in 4 ways, for example, as 27556 + 43930384 = 166^2 + 6628^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84275 + ... + 84794.

It is an arithmetic number, because the mean of its divisors is an integer number (4142215).

Almost surely, 2^43957940 is an apocalyptic number.

It is an amenable number.

43957940 is an abundant number, since it is smaller than the sum of its proper divisors (55455220).

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

43957940 is a wasteful number, since it uses less digits than its factorization.

43957940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169091 (or 169089 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 43957940 is about 6630.0784309086. The cubic root of 43957940 is about 352.9223079346.

The spelling of 43957940 in words is "forty-three million, nine hundred fifty-seven thousand, nine hundred forty".