816113428 has 24 divisors (see below), whose sum is σ = 1559136488. Its totient is φ = 371506176.

The previous prime is 816113423. The next prime is 816113437. The reversal of 816113428 is 824311618.

It can be written as a sum of positive squares in 4 ways, for example, as 10575504 + 805537924 = 3252^2 + 28382^2 .

It is a super-2 number, since 2×816113428² = 1332082254723822368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 816113393 and 816113402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816113423) 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 7 ways as a sum of consecutive naturals, for example, 103701 + ... + 111292.

Almost surely, 2^816113428 is an apocalyptic number.

It is an amenable number.

816113428 is a deficient number, since it is larger than the sum of its proper divisors (743023060).

816113428 is a wasteful number, since it uses less digits than its factorization.

816113428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215083 (or 215081 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 816113428 is about 28567.6990322987. The cubic root of 816113428 is about 934.5090421048.

It can be divided in two parts, 816 and 113428, that added together give a square (114244 = 338²).

The spelling of 816113428 in words is "eight hundred sixteen million, one hundred thirteen thousand, four hundred twenty-eight".