397416681252 has 18 divisors (see below), whose sum is σ = 1004581055478. Its totient is φ = 132472227072.

The previous prime is 397416681251. The next prime is 397416681269. The reversal of 397416681252 is 252186614793.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 274737415716 + 122679265536 = 524154^2 + 350256^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (397416681251) 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 5 ways as a sum of consecutive naturals, for example, 5519676093 + ... + 5519676164.

Almost surely, 2^397416681252 is an apocalyptic number.

It is an amenable number.

397416681252 is an abundant number, since it is smaller than the sum of its proper divisors (607164374226).

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

397416681252 is a wasteful number, since it uses less digits than its factorization.

397416681252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11039352267 (or 11039352262 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 397416681252 in words is "three hundred ninety-seven billion, four hundred sixteen million, six hundred eighty-one thousand, two hundred fifty-two".