10505990 has 32 divisors (see below), whose sum is σ = 20800800. Its totient is φ = 3788800.

The previous prime is 10505987. The next prime is 10506007. The reversal of 10505990 is 9950501.

It is a super-2 number, since 2×10505990² = 220751651760200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16070 + ... + 16710.

It is an arithmetic number, because the mean of its divisors is an integer number (650025).

Almost surely, 2^10505990 is an apocalyptic number.

10505990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10505990 is a deficient number, since it is larger than the sum of its proper divisors (10294810).

10505990 is a wasteful number, since it uses less digits than its factorization.

10505990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808.

The product of its (nonzero) digits is 2025, while the sum is 29.

The square root of 10505990 is about 3241.2944944883. The cubic root of 10505990 is about 219.0175892686.

The spelling of 10505990 in words is "ten million, five hundred five thousand, nine hundred ninety".