43402120 has 16 divisors (see below), whose sum is σ = 97654860. Its totient is φ = 17360832.

The previous prime is 43402109. The next prime is 43402133. The reversal of 43402120 is 2120434.

It can be written as a sum of positive squares in 2 ways, for example, as 42693156 + 708964 = 6534^2 + 842^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43402094 and 43402103.

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, 542487 + ... + 542566.

Almost surely, 2^43402120 is an apocalyptic number.

43402120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43402120 is an abundant number, since it is smaller than the sum of its proper divisors (54252740).

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

43402120 is a wasteful number, since it uses less digits than its factorization.

43402120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085064 (or 1085060 counting only the distinct ones).

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

The square root of 43402120 is about 6588.0285366716. The cubic root of 43402120 is about 351.4285018680.

Adding to 43402120 its reverse (2120434), we get a palindrome (45522554).

The spelling of 43402120 in words is "forty-three million, four hundred two thousand, one hundred twenty".