43663420 has 12 divisors (see below), whose sum is σ = 91693224. Its totient is φ = 17465360.

The previous prime is 43663393. The next prime is 43663421. The reversal of 43663420 is 2436634.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43663421) 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, 1091566 + ... + 1091605.

It is an arithmetic number, because the mean of its divisors is an integer number (7641102).

Almost surely, 2^43663420 is an apocalyptic number.

It is an amenable number.

43663420 is an abundant number, since it is smaller than the sum of its proper divisors (48029804).

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

43663420 is a wasteful number, since it uses less digits than its factorization.

43663420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183180 (or 2183178 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 43663420 is about 6607.8302036296. The cubic root of 43663420 is about 352.1323430564.

The spelling of 43663420 in words is "forty-three million, six hundred sixty-three thousand, four hundred twenty".