3645798 has 32 divisors (see below), whose sum is σ = 8042496. Its totient is φ = 1094688.

The previous prime is 3645791. The next prime is 3645809. The reversal of 3645798 is 8975463.

It is a happy number.

It is a d-powerful number, because it can be written as 3¹³ + 6² + 4⁶ + 5⁹ + 7⁴ + 9⁵ + 8⁵ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645791) 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, 2811 + ... + 3897.

It is an arithmetic number, because the mean of its divisors is an integer number (251328).

Almost surely, 2^3645798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3645798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4021248).

3645798 is an abundant number, since it is smaller than the sum of its proper divisors (4396698).

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

3645798 is a wasteful number, since it uses less digits than its factorization.

3645798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 181440, while the sum is 42.

The square root of 3645798 is about 1909.3972871040. The cubic root of 3645798 is about 153.9090653345.

The spelling of 3645798 in words is "three million, six hundred forty-five thousand, seven hundred ninety-eight".