10209890 has 8 divisors (see below), whose sum is σ = 18377820. Its totient is φ = 4083952.

The previous prime is 10209883. The next prime is 10209931. The reversal of 10209890 is 9890201.

10209890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10195249 + 14641 = 3193^2 + 121^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510485 + ... + 510504.

Almost surely, 2^10209890 is an apocalyptic number.

10209890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10209890 is a deficient number, since it is larger than the sum of its proper divisors (8167930).

10209890 is a wasteful number, since it uses less digits than its factorization.

10209890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020996.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 10209890 is about 3195.2918489553. The cubic root of 10209890 is about 216.9403589272.

The spelling of 10209890 in words is "ten million, two hundred nine thousand, eight hundred ninety".