43864540 has 48 divisors (see below), whose sum is σ = 98128800. Its totient is φ = 16422912.

The previous prime is 43864537. The next prime is 43864567. The reversal of 43864540 is 4546834.

It is a junction number, because it is equal to n+sod(n) for n = 43864496 and 43864505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33172 + ... + 34468.

It is an arithmetic number, because the mean of its divisors is an integer number (2044350).

Almost surely, 2^43864540 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 43864540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49064400).

43864540 is an abundant number, since it is smaller than the sum of its proper divisors (54264260).

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

43864540 is a wasteful number, since it uses less digits than its factorization.

43864540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 43864540 is about 6623.0310281623. The cubic root of 43864540 is about 352.6721724851.

The spelling of 43864540 in words is "forty-three million, eight hundred sixty-four thousand, five hundred forty".