427307816 has 24 divisors (see below), whose sum is σ = 863258970. Its totient is φ = 197121696.

The previous prime is 427307809. The next prime is 427307819. The reversal of 427307816 is 618703724.

It can be written as a sum of positive squares in only one way, i.e., 410872900 + 16434916 = 20270^2 + 4054^2 .

It is a super-2 number, since 2×427307816² = 365183939229379712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 427307816.

It is not an unprimeable number, because it can be changed into a prime (427307819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209795 + ... + 211821.

Almost surely, 2^427307816 is an apocalyptic number.

It is an amenable number.

427307816 is an abundant number, since it is smaller than the sum of its proper divisors (435951154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

427307816 is an equidigital number, since it uses as much as digits as its factorization.

427307816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073 (or 2042 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 427307816 is about 20671.4251081051. The cubic root of 427307816 is about 753.2057247677.

The spelling of 427307816 in words is "four hundred twenty-seven million, three hundred seven thousand, eight hundred sixteen".