106505820 has 48 divisors (see below), whose sum is σ = 331353120. Its totient is φ = 28401408.

The previous prime is 106505783. The next prime is 106505821. The reversal of 106505820 is 28505601.

106505820 is a `hidden beast` number, since 1 + 0 + 650 + 5 + 8 + 2 + 0 = 666.

It is a super-2 number, since 2×106505820² = 22686979387744800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106505821) 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, 98077 + ... + 99156.

It is an arithmetic number, because the mean of its divisors is an integer number (6903190).

Almost surely, 2^106505820 is an apocalyptic number.

106505820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

106505820 is an abundant number, since it is smaller than the sum of its proper divisors (224847300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

106505820 is a wasteful number, since it uses less digits than its factorization.

106505820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197251 (or 197243 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 106505820 is about 10320.1656963442. The cubic root of 106505820 is about 474.0139396638.

The spelling of 106505820 in words is "one hundred six million, five hundred five thousand, eight hundred twenty".