138308470 has 16 divisors (see below), whose sum is σ = 249618960. Its totient is φ = 55175904.

The previous prime is 138308459. The next prime is 138308473. The reversal of 138308470 is 74803831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138308473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14457 + ... + 22036.

It is an arithmetic number, because the mean of its divisors is an integer number (15601185).

Almost surely, 2^138308470 is an apocalyptic number.

138308470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138308470 is a deficient number, since it is larger than the sum of its proper divisors (111310490).

138308470 is a wasteful number, since it uses less digits than its factorization.

138308470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36879.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 138308470 is about 11760.4621507830. The cubic root of 138308470 is about 517.1496784985.

The spelling of 138308470 in words is "one hundred thirty-eight million, three hundred eight thousand, four hundred seventy".