138785426 has 16 divisors (see below), whose sum is σ = 224852544. Its totient is φ = 63866064.

The previous prime is 138785417. The next prime is 138785447. The reversal of 138785426 is 624587831.

It is a super-2 number, since 2×138785426² = 38522788940002952, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331 + ... + 16713.

It is an arithmetic number, because the mean of its divisors is an integer number (14053284).

Almost surely, 2^138785426 is an apocalyptic number.

138785426 is a deficient number, since it is larger than the sum of its proper divisors (86067118).

138785426 is a wasteful number, since it uses less digits than its factorization.

138785426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15745.

The product of its digits is 322560, while the sum is 44.

The square root of 138785426 is about 11780.7226433695. The cubic root of 138785426 is about 517.7434590807.

The spelling of 138785426 in words is "one hundred thirty-eight million, seven hundred eighty-five thousand, four hundred twenty-six".