100781136 has 60 divisors (see below), whose sum is σ = 282964032. Its totient is φ = 33484608.

The previous prime is 100781047. The next prime is 100781141. The reversal of 100781136 is 631187001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51895 + ... + 53801.

Almost surely, 2^100781136 is an apocalyptic number.

100781136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100781136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141482016).

100781136 is an abundant number, since it is smaller than the sum of its proper divisors (182182896).

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

100781136 is a wasteful number, since it uses less digits than its factorization.

100781136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288 (or 2279 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 100781136 is about 10038.9808247650. The cubic root of 100781136 is about 465.3643207982.

The spelling of 100781136 in words is "one hundred million, seven hundred eighty-one thousand, one hundred thirty-six".