3598665840 has 720 divisors, whose sum is σ = 15905544480. Its totient is φ = 745113600.

The previous prime is 3598665827. The next prime is 3598665869. The reversal of 3598665840 is 485668953.

It is a happy number.

3598665840 is a `hidden beast` number, since 3 + 59 + 8 + 6 + 6 + 584 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

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 (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12806500 + ... + 12806780.

It is an arithmetic number, because the mean of its divisors is an integer number (22091034).

Almost surely, 2^3598665840 is an apocalyptic number.

3598665840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3598665840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7952772240).

3598665840 is an abundant number, since it is smaller than the sum of its proper divisors (12306878640).

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

3598665840 is a wasteful number, since it uses less digits than its factorization.

3598665840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The square root of 3598665840 is about 59988.8809697264. The cubic root of 3598665840 is about 1532.4295118767.

The spelling of 3598665840 in words is "three billion, five hundred ninety-eight million, six hundred sixty-five thousand, eight hundred forty".