105801820 has 24 divisors (see below), whose sum is σ = 225230544. Its totient is φ = 41740416.

The previous prime is 105801811. The next prime is 105801821. The reversal of 105801820 is 28108501.

It is a super-2 number, since 2×105801820² = 22388050230624800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105801821) 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 7 ways as a sum of consecutive naturals, for example, 34774 + ... + 37693.

It is an arithmetic number, because the mean of its divisors is an integer number (9384606).

Almost surely, 2^105801820 is an apocalyptic number.

105801820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105801820 is an abundant number, since it is smaller than the sum of its proper divisors (119428724).

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

105801820 is a wasteful number, since it uses less digits than its factorization.

105801820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72549 (or 72547 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 105801820 is about 10286.0011666342. The cubic root of 105801820 is about 472.9672244482.

The spelling of 105801820 in words is "one hundred five million, eight hundred one thousand, eight hundred twenty".