100091856 has 20 divisors (see below), whose sum is σ = 258570752. Its totient is φ = 33363936.

The previous prime is 100091851. The next prime is 100091857. The reversal of 100091856 is 658190001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100091851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042576 + ... + 1042671.

Almost surely, 2^100091856 is an apocalyptic number.

100091856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

100091856 is an abundant number, since it is smaller than the sum of its proper divisors (158478896).

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

100091856 is a wasteful number, since it uses less digits than its factorization.

100091856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085258 (or 2085252 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 100091856 is about 10004.5917457935. The cubic root of 100091856 is about 464.3009591297.

The spelling of 100091856 in words is "one hundred million, ninety-one thousand, eight hundred fifty-six".