106643388 has 12 divisors (see below), whose sum is σ = 248834600. Its totient is φ = 35547792.

The previous prime is 106643377. The next prime is 106643393. The reversal of 106643388 is 883346601.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×106643388² = 22745624408237088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4443463 + ... + 4443486.

Almost surely, 2^106643388 is an apocalyptic number.

It is an amenable number.

106643388 is an abundant number, since it is smaller than the sum of its proper divisors (142191212).

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

106643388 is a wasteful number, since it uses less digits than its factorization.

106643388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8886956 (or 8886954 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 106643388 is about 10326.8285547887. The cubic root of 106643388 is about 474.2179381996.

Adding to 106643388 its reverse (883346601), we get a palindrome (989989989).

The spelling of 106643388 in words is "one hundred six million, six hundred forty-three thousand, three hundred eighty-eight".