43000000 has 98 divisors (see below), whose sum is σ = 109139228. Its totient is φ = 16800000.

The previous prime is 42999977. The next prime is 43000019. The reversal of 43000000 is 34.

43000000 is nontrivially palindromic in base 7.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 999979 + ... + 1000021.

Almost surely, 2^43000000 is an apocalyptic number.

43000000 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 43000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54569614).

43000000 is an abundant number, since it is smaller than the sum of its proper divisors (66139228).

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

43000000 is an frugal number, since it uses more digits than its factorization.

43000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 43000000 is about 6557.4385243020. The cubic root of 43000000 is about 350.3398060387.

Adding to 43000000 its reverse (34), we get a palindrome (43000034).

The spelling of 43000000 in words is "forty-three million", and thus it is an aban number and an uban number.