105612388 has 12 divisors (see below), whose sum is σ = 211224832. Its totient is φ = 45262440.

The previous prime is 105612371. The next prime is 105612391. The reversal of 105612388 is 883216501.

105612388 is an admirable number.

It is a super-2 number, since 2×105612388² = 22307952998125088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885908 + ... + 1885963.

Almost surely, 2^105612388 is an apocalyptic number.

It is an amenable number.

105612388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

105612388 is a wasteful number, since it uses less digits than its factorization.

105612388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771882 (or 3771880 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 105612388 is about 10276.7887980633. The cubic root of 105612388 is about 472.6847823877.

Adding to 105612388 its reverse (883216501), we get a palindrome (988828889).

The spelling of 105612388 in words is "one hundred five million, six hundred twelve thousand, three hundred eighty-eight".