815144038 has 4 divisors (see below), whose sum is σ = 1222716060. Its totient is φ = 407572018.

The previous prime is 815144027. The next prime is 815144047. The reversal of 815144038 is 830441518.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 830441518 = 2 ⋅415220759.

It is a junction number, because it is equal to n+sod(n) for n = 815143994 and 815144012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203786008 + ... + 203786011.

It is an arithmetic number, because the mean of its divisors is an integer number (305679015).

Almost surely, 2^815144038 is an apocalyptic number.

815144038 is a deficient number, since it is larger than the sum of its proper divisors (407572022).

815144038 is a wasteful number, since it uses less digits than its factorization.

815144038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407572021.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 815144038 is about 28550.7274513278. The cubic root of 815144038 is about 934.1388882318.

The spelling of 815144038 in words is "eight hundred fifteen million, one hundred forty-four thousand, thirty-eight".