3655830 has 32 divisors (see below), whose sum is σ = 9059328. Its totient is φ = 943200.

The previous prime is 3655807. The next prime is 3655831. The reversal of 3655830 is 385563.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655831) 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, 1036 + ... + 2895.

It is an arithmetic number, because the mean of its divisors is an integer number (283104).

Almost surely, 2^3655830 is an apocalyptic number.

3655830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3655830 is an abundant number, since it is smaller than the sum of its proper divisors (5403498).

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

3655830 is a wasteful number, since it uses less digits than its factorization.

3655830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 3655830 is about 1912.0224894075. The cubic root of 3655830 is about 154.0501045713.

The spelling of 3655830 in words is "three million, six hundred fifty-five thousand, eight hundred thirty".