43123920 has 240 divisors, whose sum is σ = 164543040. Its totient is φ = 9289728.

The previous prime is 43123903. The next prime is 43123921. The reversal of 43123920 is 2932134.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43123921) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223344 + ... + 223536.

It is an arithmetic number, because the mean of its divisors is an integer number (685596).

Almost surely, 2^43123920 is an apocalyptic number.

43123920 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 43123920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82271520).

43123920 is an abundant number, since it is smaller than the sum of its proper divisors (121419120).

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

43123920 is a wasteful number, since it uses less digits than its factorization.

43123920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 43123920 is about 6566.8805379723. The cubic root of 43123920 is about 350.6760267436.

The spelling of 43123920 in words is "forty-three million, one hundred twenty-three thousand, nine hundred twenty".