109689640 has 16 divisors (see below), whose sum is σ = 246801780. Its totient is φ = 43875840.

The previous prime is 109689617. The next prime is 109689649. The reversal of 109689640 is 46986901.

It can be written as a sum of positive squares in 2 ways, for example, as 109453444 + 236196 = 10462^2 + 486^2 .

It is not an unprimeable number, because it can be changed into a prime (109689649) 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 3 ways as a sum of consecutive naturals, for example, 1371081 + ... + 1371160.

Almost surely, 2^109689640 is an apocalyptic number.

109689640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109689640 is an abundant number, since it is smaller than the sum of its proper divisors (137112140).

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

109689640 is a wasteful number, since it uses less digits than its factorization.

109689640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742252 (or 2742248 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 109689640 is about 10473.2821980504. The cubic root of 109689640 is about 478.6909354562.

The spelling of 109689640 in words is "one hundred nine million, six hundred eighty-nine thousand, six hundred forty".