109800405 has 96 divisors (see below), whose sum is σ = 227066112. Its totient is φ = 48384000.

The previous prime is 109800403. The next prime is 109800421. The reversal of 109800405 is 504008901.

It is not a de Polignac number, because 109800405 - 2¹ = 109800403 is a prime.

It is a super-2 number, since 2×109800405² = 24112257876328050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109800403) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 727080 + ... + 727230.

It is an arithmetic number, because the mean of its divisors is an integer number (2365272).

Almost surely, 2^109800405 is an apocalyptic number.

109800405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109800405 is an abundant number, since it is smaller than the sum of its proper divisors (117265707).

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

109800405 is a wasteful number, since it uses less digits than its factorization.

109800405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 109800405 is about 10478.5688431198. The cubic root of 109800405 is about 478.8520092037.

The spelling of 109800405 in words is "one hundred nine million, eight hundred thousand, four hundred five".