11009890 has 16 divisors (see below), whose sum is σ = 20143800. Its totient is φ = 4331520.

The previous prime is 11009881. The next prime is 11009927. The reversal of 11009890 is 9890011.

It can be written as a sum of positive squares in 4 ways, for example, as 7901721 + 3108169 = 2811^2 + 1763^2 .

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, 8415 + ... + 9634.

Almost surely, 2^11009890 is an apocalyptic number.

11009890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11009890 is a deficient number, since it is larger than the sum of its proper divisors (9133910).

11009890 is a wasteful number, since it uses less digits than its factorization.

11009890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18117.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 11009890 is about 3318.1154289747. The cubic root of 11009890 is about 222.4646411009.

The spelling of 11009890 in words is "eleven million, nine thousand, eight hundred ninety".