3816640 has 28 divisors (see below), whose sum is σ = 9089136. Its totient is φ = 1526528.

The previous prime is 3816629. The next prime is 3816641. The reversal of 3816640 is 466183.

It is a junction number, because it is equal to n+sod(n) for n = 3816599 and 3816608.

It is not an unprimeable number, because it can be changed into a prime (3816641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5644 + ... + 6283.

It is an arithmetic number, because the mean of its divisors is an integer number (324612).

Almost surely, 2^3816640 is an apocalyptic number.

It is an amenable number.

3816640 is an abundant number, since it is smaller than the sum of its proper divisors (5272496).

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

3816640 is a wasteful number, since it uses less digits than its factorization.

3816640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11944 (or 11934 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3816640 is about 1953.6222766953. The cubic root of 3816640 is about 156.2765202985.

It can be divided in two parts, 381 and 6640, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 3816640 in words is "three million, eight hundred sixteen thousand, six hundred forty".