100781384 has 24 divisors (see below), whose sum is σ = 207707430. Its totient is φ = 45809280.

The previous prime is 100781371. The next prime is 100781393. The reversal of 100781384 is 483187001.

It can be written as a sum of positive squares in only one way, i.e., 95844100 + 4937284 = 9790^2 + 2222^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 100781384.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51089 + ... + 53024.

Almost surely, 2^100781384 is an apocalyptic number.

It is an amenable number.

100781384 is an abundant number, since it is smaller than the sum of its proper divisors (106926046).

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

100781384 is a wasteful number, since it uses less digits than its factorization.

100781384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104141 (or 104126 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 100781384 is about 10038.9931766089. The cubic root of 100781384 is about 465.3647025173.

The spelling of 100781384 in words is "one hundred million, seven hundred eighty-one thousand, three hundred eighty-four".