382778533 has 4 divisors (see below), whose sum is σ = 382824940. Its totient is φ = 382732128.

The previous prime is 382778531. The next prime is 382778563. The reversal of 382778533 is 335877283.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 276956164 + 105822369 = 16642^2 + 10287^2 .

It is a cyclic number.

It is not a de Polignac number, because 382778533 - 2¹ = 382778531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (382778531) 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, 7110 + ... + 28567.

It is an arithmetic number, because the mean of its divisors is an integer number (95706235).

Almost surely, 2^382778533 is an apocalyptic number.

It is an amenable number.

382778533 is a deficient number, since it is larger than the sum of its proper divisors (46407).

382778533 is a wasteful number, since it uses less digits than its factorization.

382778533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46406.

The product of its digits is 846720, while the sum is 46.

The square root of 382778533 is about 19564.7267550559. The cubic root of 382778533 is about 726.0767404657.

The spelling of 382778533 in words is "three hundred eighty-two million, seven hundred seventy-eight thousand, five hundred thirty-three".