3640190840 has 128 divisors (see below), whose sum is σ = 9700024320. Its totient is φ = 1212019200.

The previous prime is 3640190831. The next prime is 3640190861. The reversal of 3640190840 is 480910463.

It is a self number, because there is not a number n which added to its sum of digits gives 3640190840.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 723935 + ... + 728945.

It is an arithmetic number, because the mean of its divisors is an integer number (75781440).

Almost surely, 2^3640190840 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 3640190840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4850012160).

3640190840 is an abundant number, since it is smaller than the sum of its proper divisors (6059833480).

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

3640190840 is a wasteful number, since it uses less digits than its factorization.

3640190840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5173 (or 5169 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 3640190840 is about 60333.9940663636. The cubic root of 3640190840 is about 1538.3012189017.

The spelling of 3640190840 in words is "three billion, six hundred forty million, one hundred ninety thousand, eight hundred forty".