105278990 has 32 divisors (see below), whose sum is σ = 198288000. Its totient is φ = 40192768.

The previous prime is 105278989. The next prime is 105279001. The reversal of 105278990 is 99872501.

It is a super-2 number, since 2×105278990² = 22167331470840200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 23771 + ... + 27849.

It is an arithmetic number, because the mean of its divisors is an integer number (6196500).

Almost surely, 2^105278990 is an apocalyptic number.

105278990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105278990 is a deficient number, since it is larger than the sum of its proper divisors (93009010).

105278990 is a wasteful number, since it uses less digits than its factorization.

105278990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 105278990 is about 10260.5550532123. Note that the first 3 decimals coincide. The cubic root of 105278990 is about 472.1868664238.

The spelling of 105278990 in words is "one hundred five million, two hundred seventy-eight thousand, nine hundred ninety".