3640338 has 48 divisors (see below), whose sum is σ = 8701056. Its totient is φ = 1092960.

The previous prime is 3640333. The next prime is 3640369. The reversal of 3640338 is 8330463.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3640331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10833 + ... + 11163.

It is an arithmetic number, because the mean of its divisors is an integer number (181272).

Almost surely, 2^3640338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3640338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4350528).

3640338 is an abundant number, since it is smaller than the sum of its proper divisors (5060718).

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

3640338 is a wasteful number, since it uses less digits than its factorization.

3640338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 3640338 is about 1907.9669808464. The cubic root of 3640338 is about 153.8321947976.

The spelling of 3640338 in words is "three million, six hundred forty thousand, three hundred thirty-eight".