138547490 has 8 divisors (see below), whose sum is σ = 249385500. Its totient is φ = 55418992.

The previous prime is 138547439. The next prime is 138547511. The reversal of 138547490 is 94745831.

It can be written as a sum of positive squares in 2 ways, for example, as 137757169 + 790321 = 11737^2 + 889^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6927365 + ... + 6927384.

Almost surely, 2^138547490 is an apocalyptic number.

138547490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138547490 is a deficient number, since it is larger than the sum of its proper divisors (110838010).

138547490 is a wasteful number, since it uses less digits than its factorization.

138547490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13854756.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 138547490 is about 11770.6197797737. The cubic root of 138547490 is about 517.4474138885.

The spelling of 138547490 in words is "one hundred thirty-eight million, five hundred forty-seven thousand, four hundred ninety".