138257322 has 24 divisors (see below), whose sum is σ = 321660576. Its totient is φ = 39502008.

The previous prime is 138257321. The next prime is 138257351. The reversal of 138257322 is 223752831.

138257322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138257322² = 38230174173223368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138257321) 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, 234838 + ... + 235425.

It is an arithmetic number, because the mean of its divisors is an integer number (13402524).

Almost surely, 2^138257322 is an apocalyptic number.

138257322 is an abundant number, since it is smaller than the sum of its proper divisors (183403254).

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

138257322 is a wasteful number, since it uses less digits than its factorization.

138257322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470282 (or 470275 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 138257322 is about 11758.2873752941. The cubic root of 138257322 is about 517.0859214173.

The spelling of 138257322 in words is "one hundred thirty-eight million, two hundred fifty-seven thousand, three hundred twenty-two".