43970640 has 120 divisors (see below), whose sum is σ = 158605920. Its totient is φ = 10047744.

The previous prime is 43970629. The next prime is 43970657. The reversal of 43970640 is 4607934.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9891 + ... + 13629.

It is an arithmetic number, because the mean of its divisors is an integer number (1321716).

Almost surely, 2^43970640 is an apocalyptic number.

43970640 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 43970640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79302960).

43970640 is an abundant number, since it is smaller than the sum of its proper divisors (114635280).

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

43970640 is a wasteful number, since it uses less digits than its factorization.

43970640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769 (or 3756 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 43970640 is about 6631.0361181342. The cubic root of 43970640 is about 352.9562925552.

The spelling of 43970640 in words is "forty-three million, nine hundred seventy thousand, six hundred forty".