109561280 has 28 divisors (see below), whose sum is σ = 260893560. Its totient is φ = 43824384.

The previous prime is 109561273. The next prime is 109561303. The reversal of 109561280 is 82165901.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170870 + ... + 171509.

Almost surely, 2^109561280 is an apocalyptic number.

109561280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109561280 is an abundant number, since it is smaller than the sum of its proper divisors (151332280).

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

109561280 is an equidigital number, since it uses as much as digits as its factorization.

109561280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342396 (or 342386 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 109561280 is about 10467.1524303413. The cubic root of 109561280 is about 478.5041394748.

The spelling of 109561280 in words is "one hundred nine million, five hundred sixty-one thousand, two hundred eighty".