6899042890 has 8 divisors (see below), whose sum is σ = 12418277220. Its totient is φ = 2759617152.

The previous prime is 6899042831. The next prime is 6899042893. The reversal of 6899042890 is 982409986.

It can be written as a sum of positive squares in 2 ways, for example, as 6459176161 + 439866729 = 80369^2 + 20973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6899042893) 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, 344952135 + ... + 344952154.

Almost surely, 2^6899042890 is an apocalyptic number.

6899042890 is a deficient number, since it is larger than the sum of its proper divisors (5519234330).

6899042890 is a wasteful number, since it uses less digits than its factorization.

6899042890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689904296.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 6899042890 is about 83060.4773041908. The cubic root of 6899042890 is about 1903.6902325204.

The spelling of 6899042890 in words is "six billion, eight hundred ninety-nine million, forty-two thousand, eight hundred ninety".