3640491324 has 96 divisors (see below), whose sum is σ = 9795502080. Its totient is φ = 1167998400.

The previous prime is 3640491319. The next prime is 3640491329. The reversal of 3640491324 is 4231940463.

It is a happy number.

3640491324 is a `hidden beast` number, since 3 + 640 + 4 + 9 + 1 + 3 + 2 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (3640491319) and next prime (3640491329).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640491329) 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, 636622 + ... + 642314.

It is an arithmetic number, because the mean of its divisors is an integer number (102036480).

Almost surely, 2^3640491324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3640491324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4897751040).

3640491324 is an abundant number, since it is smaller than the sum of its proper divisors (6155010756).

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

3640491324 is a wasteful number, since it uses less digits than its factorization.

3640491324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5928 (or 5920 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 3640491324 is about 60336.4841866014. The cubic root of 3640491324 is about 1538.3435447216.

The spelling of 3640491324 in words is "three billion, six hundred forty million, four hundred ninety-one thousand, three hundred twenty-four".