109251440 has 40 divisors (see below), whose sum is σ = 262209408. Its totient is φ = 42289920.

The previous prime is 109251431. The next prime is 109251479. The reversal of 109251440 is 44152901.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19547 + ... + 24506.

Almost surely, 2^109251440 is an apocalyptic number.

109251440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109251440 is an abundant number, since it is smaller than the sum of its proper divisors (152957968).

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

109251440 is a wasteful number, since it uses less digits than its factorization.

109251440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44097 (or 44091 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 109251440 is about 10452.3413644982. The cubic root of 109251440 is about 478.0526426736.

The spelling of 109251440 in words is "one hundred nine million, two hundred fifty-one thousand, four hundred forty".