109578012 has 12 divisors (see below), whose sum is σ = 255682056. Its totient is φ = 36526000.

The previous prime is 109577999. The next prime is 109578017. The reversal of 109578012 is 210875901.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109578017) 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, 4565739 + ... + 4565762.

It is an arithmetic number, because the mean of its divisors is an integer number (21306838).

Almost surely, 2^109578012 is an apocalyptic number.

109578012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

109578012 is an abundant number, since it is smaller than the sum of its proper divisors (146104044).

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

109578012 is a wasteful number, since it uses less digits than its factorization.

109578012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9131508 (or 9131506 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 109578012 is about 10467.9516620970. The cubic root of 109578012 is about 478.5284969964.

The spelling of 109578012 in words is "one hundred nine million, five hundred seventy-eight thousand, twelve".