43249920 has 144 divisors (see below), whose sum is σ = 157960320. Its totient is φ = 9879552.

The previous prime is 43249919. The next prime is 43249939. The reversal of 43249920 is 2994234.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 26076 + ... + 27684.

Almost surely, 2^43249920 is an apocalyptic number.

43249920 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 43249920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78980160).

43249920 is an abundant number, since it is smaller than the sum of its proper divisors (114710400).

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

43249920 is a wasteful number, since it uses less digits than its factorization.

43249920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 43249920 is about 6576.4671366928. The cubic root of 43249920 is about 351.0172311571.

The spelling of 43249920 in words is "forty-three million, two hundred forty-nine thousand, nine hundred twenty".