3655990944 has 288 divisors, whose sum is σ = 11761646400. Its totient is φ = 1101703680.

The previous prime is 3655990931. The next prime is 3655990957. The reversal of 3655990944 is 4490995563.

3655990944 is a `hidden beast` number, since 3 + 6 + 5 + 599 + 0 + 9 + 44 = 666.

It is an interprime number because it is at equal distance from previous prime (3655990931) and next prime (3655990957).

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×3655990944² = 26732539565220022272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 47 ways as a sum of consecutive naturals, for example, 8683854 + ... + 8684274.

It is an arithmetic number, because the mean of its divisors is an integer number (40839050).

Almost surely, 2^3655990944 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 3655990944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5880823200).

3655990944 is an abundant number, since it is smaller than the sum of its proper divisors (8105655456).

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

3655990944 is a wasteful number, since it uses less digits than its factorization.

3655990944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The square root of 3655990944 is about 60464.7909448135. The cubic root of 3655990944 is about 1540.5236516840.

The spelling of 3655990944 in words is "three billion, six hundred fifty-five million, nine hundred ninety thousand, nine hundred forty-four".