815148338 has 4 divisors (see below), whose sum is σ = 1222722510. Its totient is φ = 407574168.

The previous prime is 815148337. The next prime is 815148349. The reversal of 815148338 is 833841518.

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

It can be written as a sum of positive squares in only one way, i.e., 659821969 + 155326369 = 25687^2 + 12463^2 .

It is a junction number, because it is equal to n+sod(n) for n = 815148295 and 815148304.

It is not an unprimeable number, because it can be changed into a prime (815148337) by changing a digit.

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, 203787083 + ... + 203787086.

Almost surely, 2^815148338 is an apocalyptic number.

815148338 is a deficient number, since it is larger than the sum of its proper divisors (407574172).

815148338 is a wasteful number, since it uses less digits than its factorization.

815148338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407574171.

The product of its digits is 92160, while the sum is 41.

The square root of 815148338 is about 28550.8027557895. The cubic root of 815148338 is about 934.1405308004.

The spelling of 815148338 in words is "eight hundred fifteen million, one hundred forty-eight thousand, three hundred thirty-eight".