43313920 has 144 divisors (see below), whose sum is σ = 118470240. Its totient is φ = 15040512.

The previous prime is 43313911. The next prime is 43313923. The reversal of 43313920 is 2931334.

43313920 = T₄₄₉ + T₄₅₀ + ... + T₇₀₄.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (43313923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316092 + ... + 316228.

It is an arithmetic number, because the mean of its divisors is an integer number (822710).

Almost surely, 2^43313920 is an apocalyptic number.

43313920 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 43313920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59235120).

43313920 is an abundant number, since it is smaller than the sum of its proper divisors (75156320).

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

43313920 is a wasteful number, since it uses less digits than its factorization.

43313920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 43313920 is about 6581.3311723389. The cubic root of 43313920 is about 351.1902875914.

The spelling of 43313920 in words is "forty-three million, three hundred thirteen thousand, nine hundred twenty".