533809378 has 4 divisors (see below), whose sum is σ = 800714070. Its totient is φ = 266904688.

The previous prime is 533809373. The next prime is 533809379. The reversal of 533809378 is 873908335.

It is a happy number.

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., 533286649 + 522729 = 23093^2 + 723^2 .

It is not an unprimeable number, because it can be changed into a prime (533809373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133452343 + ... + 133452346.

Almost surely, 2^533809378 is an apocalyptic number.

533809378 is a deficient number, since it is larger than the sum of its proper divisors (266904692).

533809378 is a wasteful number, since it uses less digits than its factorization.

533809378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266904691.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 533809378 is about 23104.3151380862. The cubic root of 533809378 is about 811.2014776420.

The spelling of 533809378 in words is "five hundred thirty-three million, eight hundred nine thousand, three hundred seventy-eight".