1023278566 has 12 divisors (see below), whose sum is σ = 1586031516. Its totient is φ = 495133860.

The previous prime is 1023278561. The next prime is 1023278587. The reversal of 1023278566 is 6658723201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023278561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 264280 + ... + 268123.

It is an arithmetic number, because the mean of its divisors is an integer number (132169293).

Almost surely, 2^1023278566 is an apocalyptic number.

1023278566 is a deficient number, since it is larger than the sum of its proper divisors (562752950).

1023278566 is an equidigital number, since it uses as much as digits as its factorization.

1023278566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532467 (or 532436 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 1023278566 is about 31988.7256076262. The cubic root of 1023278566 is about 1007.7000786071.

The spelling of 1023278566 in words is "one billion, twenty-three million, two hundred seventy-eight thousand, five hundred sixty-six".