43899345 has 72 divisors (see below), whose sum is σ = 90769536. Its totient is φ = 19559232.

The previous prime is 43899343. The next prime is 43899377. The reversal of 43899345 is 54399834.

It is a happy number.

It is not a de Polignac number, because 43899345 - 2¹ = 43899343 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 43899345.

It is not an unprimeable number, because it can be changed into a prime (43899343) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 94584 + ... + 95046.

It is an arithmetic number, because the mean of its divisors is an integer number (1260688).

Almost surely, 2^43899345 is an apocalyptic number.

43899345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43899345 is an abundant number, since it is smaller than the sum of its proper divisors (46870191).

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

43899345 is a wasteful number, since it uses less digits than its factorization.

43899345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 521 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 43899345 is about 6625.6580805230. The cubic root of 43899345 is about 352.7654255612.

It can be divided in two parts, 43899 and 345, that added together give a palindrome (44244).

The spelling of 43899345 in words is "forty-three million, eight hundred ninety-nine thousand, three hundred forty-five".