3645837 has 48 divisors (see below), whose sum is σ = 6324480. Its totient is φ = 2066688.

The previous prime is 3645823. The next prime is 3645877. The reversal of 3645837 is 7385463.

It is a happy number.

3645837 is a `hidden beast` number, since 3 + 645 + 8 + 3 + 7 = 666.

It is not a de Polignac number, because 3645837 - 2⁶ = 3645773 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

Its product of digits (60480) is a multiple of the sum of its prime divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77548 + ... + 77594.

It is an arithmetic number, because the mean of its divisors is an integer number (131760).

Almost surely, 2^3645837 is an apocalyptic number.

It is an amenable number.

3645837 is a deficient number, since it is larger than the sum of its proper divisors (2678643).

3645837 is a wasteful number, since it uses less digits than its factorization.

3645837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 80 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 3645837 is about 1909.4074997234. The cubic root of 3645837 is about 153.9096141337.

The spelling of 3645837 in words is "three million, six hundred forty-five thousand, eight hundred thirty-seven".