395399778488 has 32 divisors (see below), whose sum is σ = 870985528560. Its totient is φ = 165902004480.

The previous prime is 395399778481. The next prime is 395399778623. The reversal of 395399778488 is 884877993593.

It is a super-2 number, since 2×395399778488² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395399778481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172813445 + ... + 172815732.

Almost surely, 2^395399778488 is an apocalyptic number.

It is an amenable number.

395399778488 is an abundant number, since it is smaller than the sum of its proper divisors (475585750072).

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

395399778488 is a wasteful number, since it uses less digits than its factorization.

395399778488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345629207 (or 345629203 counting only the distinct ones).

The product of its digits is 3292047360, while the sum is 80.

The spelling of 395399778488 in words is "three hundred ninety-five billion, three hundred ninety-nine million, seven hundred seventy-eight thousand, four hundred eighty-eight".