138533458 has 8 divisors (see below), whose sum is σ = 237485952. Its totient is φ = 59371476.

The previous prime is 138533453. The next prime is 138533471. The reversal of 138533458 is 854335831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 138533458.

It is not an unprimeable number, because it can be changed into a prime (138533453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4947610 + ... + 4947637.

It is an arithmetic number, because the mean of its divisors is an integer number (29685744).

Almost surely, 2^138533458 is an apocalyptic number.

138533458 is a deficient number, since it is larger than the sum of its proper divisors (98952494).

138533458 is an equidigital number, since it uses as much as digits as its factorization.

138533458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9895256.

The product of its digits is 172800, while the sum is 40.

The square root of 138533458 is about 11770.0237043092. The cubic root of 138533458 is about 517.4299443858.

It can be divided in two parts, 1385 and 33458, that added together give a palindrome (34843).

The spelling of 138533458 in words is "one hundred thirty-eight million, five hundred thirty-three thousand, four hundred fifty-eight".