816405433 has 16 divisors (see below), whose sum is σ = 911070720. Its totient is φ = 727024896.

The previous prime is 816405427. The next prime is 816405449. The reversal of 816405433 is 334504618.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 816405433 - 2²¹ = 814308281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816405133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505335 + ... + 506947.

It is an arithmetic number, because the mean of its divisors is an integer number (56941920).

Almost surely, 2^816405433 is an apocalyptic number.

It is an amenable number.

816405433 is a deficient number, since it is larger than the sum of its proper divisors (94665287).

816405433 is a wasteful number, since it uses less digits than its factorization.

816405433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 816405433 is about 28572.8093298506. The cubic root of 816405433 is about 934.6204844461.

The spelling of 816405433 in words is "eight hundred sixteen million, four hundred five thousand, four hundred thirty-three".