138890470 has 16 divisors (see below), whose sum is σ = 250546608. Its totient is φ = 55435360.

The previous prime is 138890461. The next prime is 138890501. The reversal of 138890470 is 74098831.

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, 10201 + ... + 19540.

It is an arithmetic number, because the mean of its divisors is an integer number (15659163).

Almost surely, 2^138890470 is an apocalyptic number.

138890470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138890470 is a deficient number, since it is larger than the sum of its proper divisors (111656138).

138890470 is a wasteful number, since it uses less digits than its factorization.

138890470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30215.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 138890470 is about 11785.1801004482. The cubic root of 138890470 is about 517.8740494701.

The spelling of 138890470 in words is "one hundred thirty-eight million, eight hundred ninety thousand, four hundred seventy".