6990836 has 12 divisors (see below), whose sum is σ = 12324228. Its totient is φ = 3469632.

The previous prime is 6990829. The next prime is 6990839. The reversal of 6990836 is 6380996.

It can be written as a sum of positive squares in 2 ways, for example, as 4080400 + 2910436 = 2020^2 + 1706^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6990793 and 6990802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5831 + ... + 6926.

It is an arithmetic number, because the mean of its divisors is an integer number (1027019).

Almost surely, 2^6990836 is an apocalyptic number.

It is an amenable number.

6990836 is a deficient number, since it is larger than the sum of its proper divisors (5333392).

6990836 is a wasteful number, since it uses less digits than its factorization.

6990836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12898 (or 12896 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 6990836 is about 2644.0189106737. The cubic root of 6990836 is about 191.2096051500.

The spelling of 6990836 in words is "six million, nine hundred ninety thousand, eight hundred thirty-six".