43690636 has 48 divisors (see below), whose sum is σ = 87639552. Its totient is φ = 18878400.

The previous prime is 43690627. The next prime is 43690637. The reversal of 43690636 is 63609634.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 43690595 and 43690604.

It is not an unprimeable number, because it can be changed into a prime (43690637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76231 + ... + 76801.

It is an arithmetic number, because the mean of its divisors is an integer number (1825824).

Almost surely, 2^43690636 is an apocalyptic number.

It is an amenable number.

43690636 is an abundant number, since it is smaller than the sum of its proper divisors (43948916).

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

43690636 is a wasteful number, since it uses less digits than its factorization.

43690636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 43690636 is about 6609.8892577713. The cubic root of 43690636 is about 352.2054908105.

The spelling of 43690636 in words is "forty-three million, six hundred ninety thousand, six hundred thirty-six".