107856978 has 16 divisors (see below), whose sum is σ = 220975776. Its totient is φ = 35075360.

The previous prime is 107856971. The next prime is 107856979. The reversal of 107856978 is 879658701.

It is a super-4 number, since 4×107856978⁴ (a number of 33 digits) contains 4444 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 107856978.

It is not an unprimeable number, because it can be changed into a prime (107856971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218976 + ... + 219467.

It is an arithmetic number, because the mean of its divisors is an integer number (13810986).

Almost surely, 2^107856978 is an apocalyptic number.

107856978 is an abundant number, since it is smaller than the sum of its proper divisors (113118798).

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

107856978 is a wasteful number, since it uses less digits than its factorization.

107856978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438489.

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 107856978 is about 10385.4214165820. The cubic root of 107856978 is about 476.0100067336.

The spelling of 107856978 in words is "one hundred seven million, eight hundred fifty-six thousand, nine hundred seventy-eight".