100081438 has 4 divisors (see below), whose sum is σ = 150122160. Its totient is φ = 50040718.

The previous prime is 100081433. The next prime is 100081439. The reversal of 100081438 is 834180001.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100081433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25020358 + ... + 25020361.

It is an arithmetic number, because the mean of its divisors is an integer number (37530540).

Almost surely, 2^100081438 is an apocalyptic number.

100081438 is a deficient number, since it is larger than the sum of its proper divisors (50040722).

100081438 is an equidigital number, since it uses as much as digits as its factorization.

100081438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50040721.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 100081438 is about 10004.0710713189. The cubic root of 100081438 is about 464.2848497431.

The spelling of 100081438 in words is "one hundred million, eighty-one thousand, four hundred thirty-eight".