814635138 has 16 divisors (see below), whose sum is σ = 1725109920. Its totient is φ = 255571776.

The previous prime is 814635119. The next prime is 814635139. The reversal of 814635138 is 831536418.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 814635096 and 814635105.

It is not an unprimeable number, because it can be changed into a prime (814635139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3993208 + ... + 3993411.

It is an arithmetic number, because the mean of its divisors is an integer number (107819370).

Almost surely, 2^814635138 is an apocalyptic number.

814635138 is an abundant number, since it is smaller than the sum of its proper divisors (910474782).

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

814635138 is a wasteful number, since it uses less digits than its factorization.

814635138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986641.

The product of its digits is 69120, while the sum is 39.

The square root of 814635138 is about 28541.8138526619. The cubic root of 814635138 is about 933.9444513303.

The spelling of 814635138 in words is "eight hundred fourteen million, six hundred thirty-five thousand, one hundred thirty-eight".