43172040 has 32 divisors (see below), whose sum is σ = 129516480. Its totient is φ = 11512512.

The previous prime is 43172033. The next prime is 43172069. The reversal of 43172040 is 4027134.

It is a junction number, because it is equal to n+sod(n) for n = 43171998 and 43172016.

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, 179764 + ... + 180003.

It is an arithmetic number, because the mean of its divisors is an integer number (4047390).

Almost surely, 2^43172040 is an apocalyptic number.

43172040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43172040 is an abundant number, since it is smaller than the sum of its proper divisors (86344440).

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

43172040 is a wasteful number, since it uses less digits than its factorization.

43172040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359781 (or 359777 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 43172040 is about 6570.5433565269. The cubic root of 43172040 is about 350.8064126779.

Adding to 43172040 its reverse (4027134), we get a palindrome (47199174).

The spelling of 43172040 in words is "forty-three million, one hundred seventy-two thousand, forty".