109213440 has 288 divisors, whose sum is σ = 423843840. Its totient is φ = 23396352.

The previous prime is 109213373. The next prime is 109213459. The reversal of 109213440 is 44312901.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 109213440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 456841 + ... + 457079.

It is an arithmetic number, because the mean of its divisors is an integer number (1471680).

Almost surely, 2^109213440 is an apocalyptic number.

109213440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211921920).

109213440 is an abundant number, since it is smaller than the sum of its proper divisors (314630400).

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

109213440 is a wasteful number, since it uses less digits than its factorization.

109213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 109213440 is about 10450.5234318669. The cubic root of 109213440 is about 477.9972105834.

The spelling of 109213440 in words is "one hundred nine million, two hundred thirteen thousand, four hundred forty".