105680638 has 8 divisors (see below), whose sum is σ = 181166832. Its totient is φ = 45291696.

The previous prime is 105680633. The next prime is 105680639. The reversal of 105680638 is 836086501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×105680638² = 22336794496174088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105680597 and 105680606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105680633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3774295 + ... + 3774322.

It is an arithmetic number, because the mean of its divisors is an integer number (22645854).

Almost surely, 2^105680638 is an apocalyptic number.

105680638 is a deficient number, since it is larger than the sum of its proper divisors (75486194).

105680638 is an equidigital number, since it uses as much as digits as its factorization.

105680638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7548626.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 105680638 is about 10280.1088515638. The cubic root of 105680638 is about 472.7865816501.

It can be divided in two parts, 105 and 680638, that multiplied together give a triangular number (71466990 = T₁₁₉₅₅).

The spelling of 105680638 in words is "one hundred five million, six hundred eighty thousand, six hundred thirty-eight".