3644493378 has 16 divisors (see below), whose sum is σ = 7426515456. Its totient is φ = 1191909680.

The previous prime is 3644493367. The next prime is 3644493389. The reversal of 3644493378 is 8733944463.

It is an interprime number because it is at equal distance from previous prime (3644493367) and next prime (3644493389).

It is a self number, because there is not a number n which added to its sum of digits gives 3644493378.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5730018 + ... + 5730653.

It is an arithmetic number, because the mean of its divisors is an integer number (464157216).

Almost surely, 2^3644493378 is an apocalyptic number.

3644493378 is an abundant number, since it is smaller than the sum of its proper divisors (3782022078).

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

3644493378 is a wasteful number, since it uses less digits than its factorization.

3644493378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460729.

The product of its digits is 5225472, while the sum is 51.

The square root of 3644493378 is about 60369.6395384302. The cubic root of 3644493378 is about 1538.9070473528.

The spelling of 3644493378 in words is "three billion, six hundred forty-four million, four hundred ninety-three thousand, three hundred seventy-eight".