3699640 has 64 divisors (see below), whose sum is σ = 9696960. Its totient is φ = 1244160.

The previous prime is 3699629. The next prime is 3699671. The reversal of 3699640 is 469963.

3699640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3699640² = 27374672259200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3699640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20350 + ... + 20530.

It is an arithmetic number, because the mean of its divisors is an integer number (151515).

Almost surely, 2^3699640 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 3699640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4848480).

3699640 is an abundant number, since it is smaller than the sum of its proper divisors (5997320).

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

3699640 is a wasteful number, since it uses less digits than its factorization.

3699640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 3699640 is about 1923.4448263467. Note that the first 3 decimals coincide. The cubic root of 3699640 is about 154.6630209538.

The spelling of 3699640 in words is "three million, six hundred ninety-nine thousand, six hundred forty".