100942780 has 12 divisors (see below), whose sum is σ = 211979880. Its totient is φ = 40377104.

The previous prime is 100942747. The next prime is 100942811. The reversal of 100942780 is 87249001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2523550 + ... + 2523589.

It is an arithmetic number, because the mean of its divisors is an integer number (17664990).

Almost surely, 2^100942780 is an apocalyptic number.

100942780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100942780 is an abundant number, since it is smaller than the sum of its proper divisors (111037100).

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

100942780 is a wasteful number, since it uses less digits than its factorization.

100942780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047148 (or 5047146 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 100942780 is about 10047.0284164025. The cubic root of 100942780 is about 465.6129889249.

The spelling of 100942780 in words is "one hundred million, nine hundred forty-two thousand, seven hundred eighty".