105280398 has 20 divisors (see below), whose sum is σ = 235906440. Its totient is φ = 35093412.

The previous prime is 105280391. The next prime is 105280447. The reversal of 105280398 is 893082501.

It is a super-2 number, since 2×105280398² = 22167924406076808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105280391) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 324778 + ... + 325101.

It is an arithmetic number, because the mean of its divisors is an integer number (11795322).

Almost surely, 2^105280398 is an apocalyptic number.

105280398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

105280398 is an abundant number, since it is smaller than the sum of its proper divisors (130626042).

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

105280398 is an equidigital number, since it uses as much as digits as its factorization.

105280398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649893 (or 649884 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 105280398 is about 10260.6236652554. The cubic root of 105280398 is about 472.1889714217.

The spelling of 105280398 in words is "one hundred five million, two hundred eighty thousand, three hundred ninety-eight".