138473500 has 96 divisors (see below), whose sum is σ = 349562304. Its totient is φ = 47360000.

The previous prime is 138473453. The next prime is 138473527. The reversal of 138473500 is 5374831.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92760 + ... + 94240.

It is an arithmetic number, because the mean of its divisors is an integer number (3641274).

Almost surely, 2^138473500 is an apocalyptic number.

138473500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138473500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174781152).

138473500 is an abundant number, since it is smaller than the sum of its proper divisors (211088804).

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

138473500 is a wasteful number, since it uses less digits than its factorization.

138473500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528 (or 1516 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 138473500 is about 11767.4763649646. The cubic root of 138473500 is about 517.3552848248.

The spelling of 138473500 in words is "one hundred thirty-eight million, four hundred seventy-three thousand, five hundred".