105556690 has 32 divisors (see below), whose sum is σ = 193667760. Its totient is φ = 41416704.

The previous prime is 105556679. The next prime is 105556697. The reversal of 105556690 is 96655501.

It can be written as a sum of positive squares in 8 ways, for example, as 48539089 + 57017601 = 6967^2 + 7551^2 .

It is a super-2 number, since 2×105556690² = 22284429607512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105556697) by changing a digit.

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, 122742 + ... + 123598.

Almost surely, 2^105556690 is an apocalyptic number.

105556690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105556690 is a deficient number, since it is larger than the sum of its proper divisors (88111070).

105556690 is a wasteful number, since it uses less digits than its factorization.

105556690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 105556690 is about 10274.0785474903. The cubic root of 105556690 is about 472.6016727352.

The spelling of 105556690 in words is "one hundred five million, five hundred fifty-six thousand, six hundred ninety".