6869990 has 24 divisors (see below), whose sum is σ = 12675312. Its totient is φ = 2680880.

The previous prime is 6869987. The next prime is 6870011. The reversal of 6869990 is 999686.

6869990 = T₂₃₉ + T₂₄₀ + ... + T₃₇₉.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21935 + ... + 22245.

It is an arithmetic number, because the mean of its divisors is an integer number (528138).

Almost surely, 2^6869990 is an apocalyptic number.

6869990 is a deficient number, since it is larger than the sum of its proper divisors (5805322).

6869990 is a wasteful number, since it uses less digits than its factorization.

6869990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 6869990 is about 2621.0665767966. The cubic root of 6869990 is about 190.1014232276.

The spelling of 6869990 in words is "six million, eight hundred sixty-nine thousand, nine hundred ninety".