43140040 has 32 divisors (see below), whose sum is σ = 97776000. Its totient is φ = 17129664.

The previous prime is 43140037. The next prime is 43140079. The reversal of 43140040 is 4004134.

It is a super-2 number, since 2×43140040² = 3722126102403200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43139996 and 43140023.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1681 + ... + 9439.

It is an arithmetic number, because the mean of its divisors is an integer number (3055500).

Almost surely, 2^43140040 is an apocalyptic number.

43140040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43140040 is an abundant number, since it is smaller than the sum of its proper divisors (54635960).

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

43140040 is a wasteful number, since it uses less digits than its factorization.

43140040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909 (or 7905 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 43140040 is about 6568.1077944869. The cubic root of 43140040 is about 350.7197162887.

Adding to 43140040 its reverse (4004134), we get a palindrome (47144174).

The spelling of 43140040 in words is "forty-three million, one hundred forty thousand, forty".