6990189920 has 48 divisors (see below), whose sum is σ = 18873515808. Its totient is φ = 2396636160.

The previous prime is 6990189919. The next prime is 6990189949. The reversal of 6990189920 is 299810996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119501 + ... + 3121740.

It is an arithmetic number, because the mean of its divisors is an integer number (393198246).

Almost surely, 2^6990189920 is an apocalyptic number.

It is an amenable number.

6990189920 is an abundant number, since it is smaller than the sum of its proper divisors (11883325888).

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

6990189920 is a wasteful number, since it uses less digits than its factorization.

6990189920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6241263 (or 6241255 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 53.

The square root of 6990189920 is about 83607.3556572626. The cubic root of 6990189920 is about 1912.0371455701.

The spelling of 6990189920 in words is "six billion, nine hundred ninety million, one hundred eighty-nine thousand, nine hundred twenty".