3745644 has 96 divisors (see below), whose sum is σ = 10999296. Its totient is φ = 967680.

The previous prime is 3745631. The next prime is 3745649. The reversal of 3745644 is 4465473.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3745649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61374 + ... + 61434.

It is an arithmetic number, because the mean of its divisors is an integer number (114576).

Almost surely, 2^3745644 is an apocalyptic number.

3745644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3745644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5499648).

3745644 is an abundant number, since it is smaller than the sum of its proper divisors (7253652).

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

3745644 is a wasteful number, since it uses less digits than its factorization.

3745644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 133 counting only the distinct ones).

The product of its digits is 40320, while the sum is 33.

The square root of 3745644 is about 1935.3666319331. The cubic root of 3745644 is about 155.3014459689.

The spelling of 3745644 in words is "three million, seven hundred forty-five thousand, six hundred forty-four".