43986390 has 32 divisors (see below), whose sum is σ = 120648960. Its totient is φ = 10053984.

The previous prime is 43986289. The next prime is 43986391. The reversal of 43986390 is 9368934.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43986391) 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, 104520 + ... + 104939.

It is an arithmetic number, because the mean of its divisors is an integer number (3770280).

Almost surely, 2^43986390 is an apocalyptic number.

43986390 is an abundant number, since it is smaller than the sum of its proper divisors (76662570).

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

43986390 is a wasteful number, since it uses less digits than its factorization.

43986390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209476.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 43986390 is about 6632.2236090168. The cubic root of 43986390 is about 352.9984297480.

The spelling of 43986390 in words is "forty-three million, nine hundred eighty-six thousand, three hundred ninety".