43971240 has 64 divisors (see below), whose sum is σ = 134098560. Its totient is φ = 11531520.

The previous prime is 43971227. The next prime is 43971247. The reversal of 43971240 is 4217934.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 43971198 and 43971207.

It is not an unprimeable number, because it can be changed into a prime (43971247) 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, 4317 + ... + 10323.

It is an arithmetic number, because the mean of its divisors is an integer number (2095290).

Almost surely, 2^43971240 is an apocalyptic number.

43971240 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 43971240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67049280).

43971240 is an abundant number, since it is smaller than the sum of its proper divisors (90127320).

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

43971240 is a wasteful number, since it uses less digits than its factorization.

43971240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082 (or 6078 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 43971240 is about 6631.0813597784. The cubic root of 43971240 is about 352.9578979659.

The spelling of 43971240 in words is "forty-three million, nine hundred seventy-one thousand, two hundred forty".