3657942 has 24 divisors (see below), whose sum is σ = 8006544. Its totient is φ = 1206864.

The previous prime is 3657919. The next prime is 3657949. The reversal of 3657942 is 2497563.

It is a junction number, because it is equal to n+sod(n) for n = 3657897 and 3657906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3657949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 868 + ... + 2840.

It is an arithmetic number, because the mean of its divisors is an integer number (333606).

Almost surely, 2^3657942 is an apocalyptic number.

3657942 is an abundant number, since it is smaller than the sum of its proper divisors (4348602).

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

3657942 is a wasteful number, since it uses less digits than its factorization.

3657942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084 (or 2081 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 3657942 is about 1912.5747044233. The cubic root of 3657942 is about 154.0797641550.

The spelling of 3657942 in words is "three million, six hundred fifty-seven thousand, nine hundred forty-two".