138460406 has 16 divisors (see below), whose sum is σ = 237950880. Its totient is φ = 59192640.

The previous prime is 138460381. The next prime is 138460447. The reversal of 138460406 is 604064831.

It is a super-3 number, since 3×138460406³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6365 + ... + 17816.

It is an arithmetic number, because the mean of its divisors is an integer number (14871930).

Almost surely, 2^138460406 is an apocalyptic number.

138460406 is a deficient number, since it is larger than the sum of its proper divisors (99490474).

138460406 is a wasteful number, since it uses less digits than its factorization.

138460406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24599.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 138460406 is about 11766.9199878303. The cubic root of 138460406 is about 517.3389773396.

The spelling of 138460406 in words is "one hundred thirty-eight million, four hundred sixty thousand, four hundred six".