43980000 has 120 divisors (see below), whose sum is σ = 144460008. Its totient is φ = 11712000.

The previous prime is 43979993. The next prime is 43980019. The reversal of 43980000 is 8934.

43980000 is nontrivially palindromic in base 7.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59634 + ... + 60366.

Almost surely, 2^43980000 is an apocalyptic number.

43980000 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 43980000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72230004).

43980000 is an abundant number, since it is smaller than the sum of its proper divisors (100480008).

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

43980000 is an equidigital number, since it uses as much as digits as its factorization.

43980000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 43980000 is about 6631.7418526357. The cubic root of 43980000 is about 352.9813352997.

Adding to 43980000 its reverse (8934), we get a palindrome (43988934).

The spelling of 43980000 in words is "forty-three million, nine hundred eighty thousand".