138473118 has 96 divisors (see below), whose sum is σ = 364435200. Its totient is φ = 38849328.

The previous prime is 138473117. The next prime is 138473119. The reversal of 138473118 is 811374831.

It is an interprime number because it is at equal distance from previous prime (138473117) and next prime (138473119).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138473117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155671 + ... + 156557.

It is an arithmetic number, because the mean of its divisors is an integer number (3796200).

Almost surely, 2^138473118 is an apocalyptic number.

138473118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138473118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182217600).

138473118 is an abundant number, since it is smaller than the sum of its proper divisors (225962082).

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

138473118 is a wasteful number, since it uses less digits than its factorization.

138473118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 958 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 138473118 is about 11767.4601337757. The cubic root of 138473118 is about 517.3548090902.

The spelling of 138473118 in words is "one hundred thirty-eight million, four hundred seventy-three thousand, one hundred eighteen".