138476490 has 32 divisors (see below), whose sum is σ = 332925120. Its totient is φ = 36862464.

The previous prime is 138476489. The next prime is 138476497. The reversal of 138476490 is 94674831.

It is not an unprimeable number, because it can be changed into a prime (138476497) 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 15 ways as a sum of consecutive naturals, for example, 14842 + ... + 22298.

It is an arithmetic number, because the mean of its divisors is an integer number (10403910).

Almost surely, 2^138476490 is an apocalyptic number.

138476490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138476490 is an abundant number, since it is smaller than the sum of its proper divisors (194448630).

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

138476490 is a wasteful number, since it uses less digits than its factorization.

138476490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 138476490 is about 11767.6034093608. The cubic root of 138476490 is about 517.3590084763.

The spelling of 138476490 in words is "one hundred thirty-eight million, four hundred seventy-six thousand, four hundred ninety".