106778638 has 8 divisors (see below), whose sum is σ = 165691080. Its totient is φ = 51548280.

The previous prime is 106778629. The next prime is 106778641. The reversal of 106778638 is 836877601.

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

It is a super-2 number, since 2×106778638² = 22803355066270088, 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, 920448 + ... + 920563.

It is an arithmetic number, because the mean of its divisors is an integer number (20711385).

Almost surely, 2^106778638 is an apocalyptic number.

106778638 is a deficient number, since it is larger than the sum of its proper divisors (58912442).

106778638 is a wasteful number, since it uses less digits than its factorization.

106778638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841042.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 106778638 is about 10333.3749569054. The cubic root of 106778638 is about 474.4183284354.

It can be divided in two parts, 106778 and 638, that added together give a triangular number (107416 = T₄₆₃).

The spelling of 106778638 in words is "one hundred six million, seven hundred seventy-eight thousand, six hundred thirty-eight".