100305980 has 12 divisors (see below), whose sum is σ = 210642600. Its totient is φ = 40122384.

The previous prime is 100305979. The next prime is 100305991. The reversal of 100305980 is 89503001.

It is a super-2 number, since 2×100305980² = 20122579247520800, which contains 22 as substring.

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, 2507630 + ... + 2507669.

It is an arithmetic number, because the mean of its divisors is an integer number (17553550).

Almost surely, 2^100305980 is an apocalyptic number.

100305980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100305980 is an abundant number, since it is smaller than the sum of its proper divisors (110336620).

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

100305980 is a wasteful number, since it uses less digits than its factorization.

100305980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015308 (or 5015306 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 100305980 is about 10015.2873149002. The cubic root of 100305980 is about 464.6318124497.

Adding to 100305980 its reverse (89503001), we get a palindrome (189808981).

The spelling of 100305980 in words is "one hundred million, three hundred five thousand, nine hundred eighty".