43772140 has 12 divisors (see below), whose sum is σ = 91921536. Its totient is φ = 17508848.

The previous prime is 43772137. The next prime is 43772167. The reversal of 43772140 is 4127734.

It is a junction number, because it is equal to n+sod(n) for n = 43772099 and 43772108.

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, 1094284 + ... + 1094323.

It is an arithmetic number, because the mean of its divisors is an integer number (7660128).

Almost surely, 2^43772140 is an apocalyptic number.

It is an amenable number.

43772140 is an abundant number, since it is smaller than the sum of its proper divisors (48149396).

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

43772140 is a wasteful number, since it uses less digits than its factorization.

43772140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188616 (or 2188614 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 43772140 is about 6616.0516926638. The cubic root of 43772140 is about 352.4243655106.

Adding to 43772140 its reverse (4127734), we get a palindrome (47899874).

The spelling of 43772140 in words is "forty-three million, seven hundred seventy-two thousand, one hundred forty".