43312340 has 12 divisors (see below), whose sum is σ = 90955956. Its totient is φ = 17324928.

The previous prime is 43312331. The next prime is 43312361. The reversal of 43312340 is 4321334.

It can be written as a sum of positive squares in 2 ways, for example, as 13675204 + 29637136 = 3698^2 + 5444^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2165617 = 43312340 / (4 + 3 + 3 + 1 + 2 + 3 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082789 + ... + 1082828.

It is an arithmetic number, because the mean of its divisors is an integer number (7579663).

Almost surely, 2^43312340 is an apocalyptic number.

It is an amenable number.

43312340 is an abundant number, since it is smaller than the sum of its proper divisors (47643616).

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

43312340 is a wasteful number, since it uses less digits than its factorization.

43312340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165626 (or 2165624 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 43312340 is about 6581.2111347380. The cubic root of 43312340 is about 351.1860173137.

Adding to 43312340 its reverse (4321334), we get a palindrome (47633674).

The spelling of 43312340 in words is "forty-three million, three hundred twelve thousand, three hundred forty".