816432041 has 4 divisors (see below), whose sum is σ = 844584900. Its totient is φ = 788279184.

The previous prime is 816432037. The next prime is 816432049. The reversal of 816432041 is 140234618.

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

It can be written as a sum of positive squares in 2 ways, for example, as 572166400 + 244265641 = 23920^2 + 15629^2 .

It is a cyclic number.

It is not a de Polignac number, because 816432041 - 2² = 816432037 is a prime.

It is a super-2 number, since 2×816432041² = 1333122555142851362, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 28152829 = 816432041 / (8 + 1 + 6 + 4 + 3 + 2 + 0 + 4 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816431995 and 816432013.

It is not an unprimeable number, because it can be changed into a prime (816432049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14076386 + ... + 14076443.

It is an arithmetic number, because the mean of its divisors is an integer number (211146225).

Almost surely, 2^816432041 is an apocalyptic number.

It is an amenable number.

816432041 is a deficient number, since it is larger than the sum of its proper divisors (28152859).

816432041 is a wasteful number, since it uses less digits than its factorization.

816432041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28152858.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 816432041 is about 28573.2749435552. The cubic root of 816432041 is about 934.6306379437.

Adding to 816432041 its reverse (140234618), we get a palindrome (956666659).

The spelling of 816432041 in words is "eight hundred sixteen million, four hundred thirty-two thousand, forty-one".