105780785 has 32 divisors (see below), whose sum is σ = 142884864. Its totient is φ = 74520000.

The previous prime is 105780781. The next prime is 105780799. The reversal of 105780785 is 587087501.

It is not a de Polignac number, because 105780785 - 2² = 105780781 is a prime.

It is a super-2 number, since 2×105780785² = 22379148950432450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105780781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390200 + ... + 390470.

It is an arithmetic number, because the mean of its divisors is an integer number (4465152).

Almost surely, 2^105780785 is an apocalyptic number.

It is an amenable number.

105780785 is a deficient number, since it is larger than the sum of its proper divisors (37104079).

105780785 is a wasteful number, since it uses less digits than its factorization.

105780785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 105780785 is about 10284.9786096034. The cubic root of 105780785 is about 472.9358780278.

The spelling of 105780785 in words is "one hundred five million, seven hundred eighty thousand, seven hundred eighty-five".