6989890 has 16 divisors (see below), whose sum is σ = 13322232. Its totient is φ = 2631424.

The previous prime is 6989869. The next prime is 6989921. The reversal of 6989890 is 989896.

It can be written as a sum of positive squares in 4 ways, for example, as 6661561 + 328329 = 2581^2 + 573^2 .

It is an alternating number because its digits alternate between even and odd.

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, 20389 + ... + 20728.

Almost surely, 2^6989890 is an apocalyptic number.

6989890 is a deficient number, since it is larger than the sum of its proper divisors (6332342).

6989890 is a wasteful number, since it uses less digits than its factorization.

6989890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41141.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 6989890 is about 2643.8400102881. The cubic root of 6989890 is about 191.2009799323.

The spelling of 6989890 in words is "six million, nine hundred eighty-nine thousand, eight hundred ninety".