565397978 has 8 divisors (see below), whose sum is σ = 877341780. Its totient is φ = 272950720.

The previous prime is 565397971. The next prime is 565398047. The reversal of 565397978 is 879793565.

565397978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 534673129 + 30724849 = 23123^2 + 5543^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (565397971) 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, 4874063 + ... + 4874178.

Almost surely, 2^565397978 is an apocalyptic number.

565397978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

565397978 is a deficient number, since it is larger than the sum of its proper divisors (311943802).

565397978 is a wasteful number, since it uses less digits than its factorization.

565397978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9748272.

The product of its digits is 14288400, while the sum is 59.

The square root of 565397978 is about 23778.0987044801. The cubic root of 565397978 is about 826.8970013363.

The spelling of 565397978 in words is "five hundred sixty-five million, three hundred ninety-seven thousand, nine hundred seventy-eight".