6990189784 has 16 divisors (see below), whose sum is σ = 13161448800. Its totient is φ = 3480470112.

The previous prime is 6990189781. The next prime is 6990189799. The reversal of 6990189784 is 4879810996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990189781) 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, 1826067 + ... + 1829890.

It is an arithmetic number, because the mean of its divisors is an integer number (822590550).

Almost surely, 2^6990189784 is an apocalyptic number.

It is an amenable number.

6990189784 is a deficient number, since it is larger than the sum of its proper divisors (6171259016).

6990189784 is a wasteful number, since it uses less digits than its factorization.

6990189784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3656202 (or 3656198 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 6990189784 is about 83607.3548439370. The cubic root of 6990189784 is about 1912.0371331700.

The spelling of 6990189784 in words is "six billion, nine hundred ninety million, one hundred eighty-nine thousand, seven hundred eighty-four".