815428196 has 18 divisors (see below), whose sum is σ = 1568520870. Its totient is φ = 370648960.

The previous prime is 815428193. The next prime is 815428219. The reversal of 815428196 is 691824518.

It can be written as a sum of positive squares in only one way, i.e., 811680100 + 3748096 = 28490^2 + 1936^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (815428193) 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 in 5 ways as a sum of consecutive naturals, for example, 841901 + ... + 842868.

Almost surely, 2^815428196 is an apocalyptic number.

It is an amenable number.

815428196 is a deficient number, since it is larger than the sum of its proper divisors (753092674).

815428196 is a wasteful number, since it uses less digits than its factorization.

815428196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684795 (or 1684782 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 815428196 is about 28555.7033882901. The cubic root of 815428196 is about 934.2474220971.

The spelling of 815428196 in words is "eight hundred fifteen million, four hundred twenty-eight thousand, one hundred ninety-six".