43974240 has 144 divisors (see below), whose sum is σ = 147610512. Its totient is φ = 11001856.

The previous prime is 43974239. The next prime is 43974247. The reversal of 43974240 is 4247934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43974247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138562 + ... + 138878.

It is an arithmetic number, because the mean of its divisors is an integer number (1025073).

Almost surely, 2^43974240 is an apocalyptic number.

43974240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43974240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73805256).

43974240 is an abundant number, since it is smaller than the sum of its proper divisors (103636272).

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

43974240 is a wasteful number, since it uses less digits than its factorization.

43974240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 43974240 is about 6631.3075633694. The cubic root of 43974240 is about 352.9659248005.

The spelling of 43974240 in words is "forty-three million, nine hundred seventy-four thousand, two hundred forty".