3657690 has 128 divisors (see below), whose sum is σ = 11059200. Its totient is φ = 855360.

The previous prime is 3657679. The next prime is 3657691. The reversal of 3657690 is 967563.

It is a happy number.

It is a super-2 number, since 2×3657690² = 26757392272200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3657691) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 117975 + ... + 118005.

It is an arithmetic number, because the mean of its divisors is an integer number (86400).

Almost surely, 2^3657690 is an apocalyptic number.

3657690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3657690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5529600).

3657690 is an abundant number, since it is smaller than the sum of its proper divisors (7401510).

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

3657690 is a wasteful number, since it uses less digits than its factorization.

3657690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 3657690 is about 1912.5088235091. The cubic root of 3657690 is about 154.0762258273.

The spelling of 3657690 in words is "three million, six hundred fifty-seven thousand, six hundred ninety".