43113720 has 128 divisors (see below), whose sum is σ = 144244800. Its totient is φ = 10235904.

The previous prime is 43113713. The next prime is 43113731. The reversal of 43113720 is 2731134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44764 + ... + 45716.

Almost surely, 2^43113720 is an apocalyptic number.

43113720 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 43113720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72122400).

43113720 is an abundant number, since it is smaller than the sum of its proper divisors (101131080).

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

43113720 is a wasteful number, since it uses less digits than its factorization.

43113720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 43113720 is about 6566.1038675915. The cubic root of 43113720 is about 350.6483763698.

Adding to 43113720 its reverse (2731134), we get a palindrome (45844854).

The spelling of 43113720 in words is "forty-three million, one hundred thirteen thousand, seven hundred twenty".