43640316 has 96 divisors (see below), whose sum is σ = 118657280. Its totient is φ = 13856832.

The previous prime is 43640297. The next prime is 43640323. The reversal of 43640316 is 61304634.

43640316 is a `hidden beast` number, since 4 + 3 + 640 + 3 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 43640316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267651 + ... + 267813.

Almost surely, 2^43640316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43640316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59328640).

43640316 is an abundant number, since it is smaller than the sum of its proper divisors (75016964).

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

43640316 is a wasteful number, since it uses less digits than its factorization.

43640316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 43640316 is about 6606.0817433635. The cubic root of 43640316 is about 352.0702231626.

It can be divided in two parts, 43640 and 316, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 43640316 in words is "forty-three million, six hundred forty thousand, three hundred sixteen".