100071780 has 24 divisors (see below), whose sum is σ = 280201152. Its totient is φ = 26685792.

The previous prime is 100071767. The next prime is 100071859. The reversal of 100071780 is 87170001.

It is a super-2 number, since 2×100071780² = 20028722304736800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100071780.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833872 + ... + 833991.

It is an arithmetic number, because the mean of its divisors is an integer number (11675048).

Almost surely, 2^100071780 is an apocalyptic number.

100071780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100071780 is an abundant number, since it is smaller than the sum of its proper divisors (180129372).

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

100071780 is a wasteful number, since it uses less digits than its factorization.

100071780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667875 (or 1667873 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 100071780 is about 10003.5883561850. The cubic root of 100071780 is about 464.2699145483.

The spelling of 100071780 in words is "one hundred million, seventy-one thousand, seven hundred eighty".