43400120 has 16 divisors (see below), whose sum is σ = 97650360. Its totient is φ = 17360032.

The previous prime is 43400111. The next prime is 43400131. The reversal of 43400120 is 2100434.

It is a junction number, because it is equal to n+sod(n) for n = 43400095 and 43400104.

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, 542462 + ... + 542541.

Almost surely, 2^43400120 is an apocalyptic number.

43400120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43400120 is an abundant number, since it is smaller than the sum of its proper divisors (54250240).

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

43400120 is a wasteful number, since it uses less digits than its factorization.

43400120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085014 (or 1085010 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 43400120 is about 6587.8767444451. The cubic root of 43400120 is about 351.4231037615.

Adding to 43400120 its reverse (2100434), we get a palindrome (45500554).

The spelling of 43400120 in words is "forty-three million, four hundred thousand, one hundred twenty".