43431340 has 48 divisors (see below), whose sum is σ = 98632800. Its totient is φ = 16008192.

The previous prime is 43431331. The next prime is 43431371. The reversal of 43431340 is 4313434.

43431340 = T₆₉ + T₇₀ + ... + T₆₃₈.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12516 + ... + 15604.

It is an arithmetic number, because the mean of its divisors is an integer number (2054850).

Almost surely, 2^43431340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43431340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49316400).

43431340 is an abundant number, since it is smaller than the sum of its proper divisors (55201460).

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

43431340 is a wasteful number, since it uses less digits than its factorization.

43431340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154 (or 3152 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 43431340 is about 6590.2458224257. The cubic root of 43431340 is about 351.5073493011.

Adding to 43431340 its reverse (4313434), we get a palindrome (47744774).

The spelling of 43431340 in words is "forty-three million, four hundred thirty-one thousand, three hundred forty".