100581438 has 16 divisors (see below), whose sum is σ = 209909376. Its totient is φ = 32069400.

The previous prime is 100581431. The next prime is 100581449. The reversal of 100581438 is 834185001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100581431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364288 + ... + 364563.

It is an arithmetic number, because the mean of its divisors is an integer number (13119336).

Almost surely, 2^100581438 is an apocalyptic number.

100581438 is an abundant number, since it is smaller than the sum of its proper divisors (109327938).

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

100581438 is a wasteful number, since it uses less digits than its factorization.

100581438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728879.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 100581438 is about 10029.0297636411. The cubic root of 100581438 is about 465.0567441447.

The spelling of 100581438 in words is "one hundred million, five hundred eighty-one thousand, four hundred thirty-eight".