8390836 has 6 divisors (see below), whose sum is σ = 14683970. Its totient is φ = 4195416.

The previous prime is 8390819. The next prime is 8390857. The reversal of 8390836 is 6380938.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8088336 + 302500 = 2844^2 + 550^2 .

It is a super-2 number, since 2×8390836² = 140812257557792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8390795 and 8390804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1048851 + ... + 1048858.

Almost surely, 2^8390836 is an apocalyptic number.

It is an amenable number.

8390836 is a deficient number, since it is larger than the sum of its proper divisors (6293134).

8390836 is a wasteful number, since it uses less digits than its factorization.

8390836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097713 (or 2097711 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 8390836 is about 2896.6939776235. The cubic root of 8390836 is about 203.2053217963.

The spelling of 8390836 in words is "eight million, three hundred ninety thousand, eight hundred thirty-six".