3685775798 has 4 divisors (see below), whose sum is σ = 5528663700. Its totient is φ = 1842887898.

The previous prime is 3685775789. The next prime is 3685775887. The reversal of 3685775798 is 8975775863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8975775863 = 131 ⋅68517373.

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 as a sum of consecutive naturals, namely, 921443948 + ... + 921443951.

It is an arithmetic number, because the mean of its divisors is an integer number (1382165925).

Almost surely, 2^3685775798 is an apocalyptic number.

3685775798 is a deficient number, since it is larger than the sum of its proper divisors (1842887902).

3685775798 is a wasteful number, since it uses less digits than its factorization.

3685775798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842887901.

The product of its digits is 88905600, while the sum is 65.

The square root of 3685775798 is about 60710.5904929280. The cubic root of 3685775798 is about 1544.6958199953.

Adding to 3685775798 its sum of digits (65), we get a palindrome (3685775863).

The spelling of 3685775798 in words is "three billion, six hundred eighty-five million, seven hundred seventy-five thousand, seven hundred ninety-eight".