100538138 has 16 divisors (see below), whose sum is σ = 155393640. Its totient is φ = 48761856.

The previous prime is 100538117. The next prime is 100538173. The reversal of 100538138 is 831835001.

It can be written as a sum of positive squares in 4 ways, for example, as 56806369 + 43731769 = 7537^2 + 6613^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100538138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4106 + ... + 14762.

Almost surely, 2^100538138 is an apocalyptic number.

100538138 is a deficient number, since it is larger than the sum of its proper divisors (54855502).

100538138 is a wasteful number, since it uses less digits than its factorization.

100538138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10801.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 100538138 is about 10026.8707980107. The cubic root of 100538138 is about 464.9899993995.

The spelling of 100538138 in words is "one hundred million, five hundred thirty-eight thousand, one hundred thirty-eight".