109642806 has 144 divisors (see below), whose sum is σ = 310602240. Its totient is φ = 27293760.

The previous prime is 109642801. The next prime is 109642807. The reversal of 109642806 is 608246901.

109642806 is a `hidden beast` number, since 1 + 0 + 9 + 642 + 8 + 0 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109642801) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 404451 + ... + 404721.

It is an arithmetic number, because the mean of its divisors is an integer number (2156960).

Almost surely, 2^109642806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109642806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155301120).

109642806 is an abundant number, since it is smaller than the sum of its proper divisors (200959434).

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

109642806 is a wasteful number, since it uses less digits than its factorization.

109642806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 109642806 is about 10471.0460795472. The cubic root of 109642806 is about 478.6227971380.

The spelling of 109642806 in words is "one hundred nine million, six hundred forty-two thousand, eight hundred six".