3656838 has 16 divisors (see below), whose sum is σ = 7372800. Its totient is φ = 1209096.

The previous prime is 3656837. The next prime is 3656843. The reversal of 3656838 is 8386563.

It is a junction number, because it is equal to n+sod(n) for n = 3656796 and 3656805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1638 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (460800).

Almost surely, 2^3656838 is an apocalyptic number.

3656838 is an abundant number, since it is smaller than the sum of its proper divisors (3715962).

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

3656838 is a wasteful number, since it uses less digits than its factorization.

3656838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4931.

The product of its digits is 103680, while the sum is 39.

The square root of 3656838 is about 1912.2860664660. The cubic root of 3656838 is about 154.0642617062.

The spelling of 3656838 in words is "three million, six hundred fifty-six thousand, eight hundred thirty-eight".