638253341 has 12 divisors (see below), whose sum is σ = 704195100. Its totient is φ = 578043840.

The previous prime is 638253337. The next prime is 638253349. The reversal of 638253341 is 143352836.

638253341 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 387696100 + 250557241 = 19690^2 + 15829^2 .

It is not a de Polignac number, because 638253341 - 2² = 638253337 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638253349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22745 + ... + 42353.

It is an arithmetic number, because the mean of its divisors is an integer number (58682925).

Almost surely, 2^638253341 is an apocalyptic number.

It is an amenable number.

638253341 is a deficient number, since it is larger than the sum of its proper divisors (65941759).

638253341 is a wasteful number, since it uses less digits than its factorization.

638253341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19900 (or 19889 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 638253341 is about 25263.6763160075. The cubic root of 638253341 is about 860.9891903319.

The spelling of 638253341 in words is "six hundred thirty-eight million, two hundred fifty-three thousand, three hundred forty-one".