109978506 has 32 divisors (see below), whose sum is σ = 266616000. Its totient is φ = 33326640.

The previous prime is 109978499. The next prime is 109978511. The reversal of 109978506 is 605879901.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91981 + ... + 93168.

It is an arithmetic number, because the mean of its divisors is an integer number (8331750).

Almost surely, 2^109978506 is an apocalyptic number.

109978506 is an abundant number, since it is smaller than the sum of its proper divisors (156637494).

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

109978506 is a wasteful number, since it uses less digits than its factorization.

109978506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185171 (or 185165 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 109978506 is about 10487.0637453960. The cubic root of 109978506 is about 479.1107755587.

It can be divided in two parts, 10997 and 8506, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 109978506 in words is "one hundred nine million, nine hundred seventy-eight thousand, five hundred six".