3643787898 has 72 divisors (see below), whose sum is σ = 8238851712. Its totient is φ = 1163603232.

The previous prime is 3643787881. The next prime is 3643787929. The reversal of 3643787898 is 8987873463.

3643787898 is a `hidden beast` number, since 36 + 437 + 87 + 8 + 98 = 666.

It is a super-2 number, since 2×3643787898² = 26554380491222516808, which contains 22 as substring.

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 35 ways as a sum of consecutive naturals, for example, 1649911 + ... + 1652117.

It is an arithmetic number, because the mean of its divisors is an integer number (114428496).

Almost surely, 2^3643787898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3643787898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4119425856).

3643787898 is an abundant number, since it is smaller than the sum of its proper divisors (4595063814).

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

3643787898 is a wasteful number, since it uses less digits than its factorization.

3643787898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356 (or 2316 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The square root of 3643787898 is about 60363.7962523896. The cubic root of 3643787898 is about 1538.8077433626.

The spelling of 3643787898 in words is "three billion, six hundred forty-three million, seven hundred eighty-seven thousand, eight hundred ninety-eight".