9867890 has 16 divisors (see below), whose sum is σ = 17988480. Its totient is φ = 3896880.

The previous prime is 9867883. The next prime is 9867929. The reversal of 9867890 is 987689.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5456 + ... + 7035.

It is an arithmetic number, because the mean of its divisors is an integer number (1124280).

Almost surely, 2^9867890 is an apocalyptic number.

9867890 is a deficient number, since it is larger than the sum of its proper divisors (8120590).

9867890 is a wasteful number, since it uses less digits than its factorization.

9867890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12577.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 9867890 is about 3141.3197863319. The cubic root of 9867890 is about 214.4905189036.

It can be divided in two parts, 986 and 7890, that multiplied together give a triangular number (7779540 = T₃₉₄₄).

The spelling of 9867890 in words is "nine million, eight hundred sixty-seven thousand, eight hundred ninety".