6990156 has 36 divisors (see below), whose sum is σ = 17758104. Its totient is φ = 2318400.

The previous prime is 6990107. The next prime is 6990161. The reversal of 6990156 is 6510996.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6990156.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9771 + ... + 10461.

Almost surely, 2^6990156 is an apocalyptic number.

It is an amenable number.

6990156 is an abundant number, since it is smaller than the sum of its proper divisors (10767948).

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

6990156 is a wasteful number, since it uses less digits than its factorization.

6990156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 6990156 is about 2643.8903154254. The cubic root of 6990156 is about 191.2034052836.

The spelling of 6990156 in words is "six million, nine hundred ninety thousand, one hundred fifty-six".