43672840 has 32 divisors (see below), whose sum is σ = 101655000. Its totient is φ = 16866304.

The previous prime is 43672829. The next prime is 43672879. The reversal of 43672840 is 4827634.

It can be written as a sum of positive squares in 4 ways, for example, as 42536484 + 1136356 = 6522^2 + 1066^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43672796 and 43672805.

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, 17665 + ... + 19984.

Almost surely, 2^43672840 is an apocalyptic number.

43672840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43672840 is an abundant number, since it is smaller than the sum of its proper divisors (57982160).

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

43672840 is a wasteful number, since it uses less digits than its factorization.

43672840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37689 (or 37685 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 43672840 is about 6608.5429559019. The cubic root of 43672840 is about 352.1576643906.

The spelling of 43672840 in words is "forty-three million, six hundred seventy-two thousand, eight hundred forty".