43867640 has 16 divisors (see below), whose sum is σ = 98702280. Its totient is φ = 17547040.

The previous prime is 43867639. The next prime is 43867643. The reversal of 43867640 is 4676834.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 43867594 and 43867603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43867643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548306 + ... + 548385.

Almost surely, 2^43867640 is an apocalyptic number.

43867640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43867640 is an abundant number, since it is smaller than the sum of its proper divisors (54834640).

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

43867640 is a wasteful number, since it uses less digits than its factorization.

43867640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096702 (or 1096698 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 43867640 is about 6623.2650558467. The cubic root of 43867640 is about 352.6804803193.

The spelling of 43867640 in words is "forty-three million, eight hundred sixty-seven thousand, six hundred forty".