4427685864 has 72 divisors (see below), whose sum is σ = 13949480610. Its totient is φ = 1265052096.

The previous prime is 4427685851. The next prime is 4427685923. The reversal of 4427685864 is 4685867244.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3432788100 + 994897764 = 58590^2 + 31542^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×4427685864² = 39208804220530852992, 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 4427685864.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 623979 + ... + 631034.

Almost surely, 2^4427685864 is an apocalyptic number.

It is an amenable number.

4427685864 is an abundant number, since it is smaller than the sum of its proper divisors (9521794746).

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

4427685864 is a wasteful number, since it uses less digits than its factorization.

4427685864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255039 (or 1255025 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 54.

The square root of 4427685864 is about 66540.8586058220. The cubic root of 4427685864 is about 1642.0722693763.

The spelling of 4427685864 in words is "four billion, four hundred twenty-seven million, six hundred eighty-five thousand, eight hundred sixty-four".