3639798 has 24 divisors (see below), whose sum is σ = 7921368. Its totient is φ = 1207872.

The previous prime is 3639781. The next prime is 3639817. The reversal of 3639798 is 8979363.

It is a happy number.

3639798 is a `hidden beast` number, since 3 + 639 + 7 + 9 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7561 + ... + 8027.

It is an arithmetic number, because the mean of its divisors is an integer number (330057).

Almost surely, 2^3639798 is an apocalyptic number.

3639798 is an abundant number, since it is smaller than the sum of its proper divisors (4281570).

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

3639798 is a wasteful number, since it uses less digits than its factorization.

3639798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 905 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3639798 is about 1907.8254637152. The cubic root of 3639798 is about 153.8245880412.

The spelling of 3639798 in words is "three million, six hundred thirty-nine thousand, seven hundred ninety-eight".