138676670 has 32 divisors (see below), whose sum is σ = 273870720. Its totient is φ = 50139040.

The previous prime is 138676669. The next prime is 138676691. The reversal of 138676670 is 76676831.

It is a happy number.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 16169 + ... + 23211.

It is an arithmetic number, because the mean of its divisors is an integer number (8558460).

Almost surely, 2^138676670 is an apocalyptic number.

138676670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138676670 is a deficient number, since it is larger than the sum of its proper divisors (135194050).

138676670 is a wasteful number, since it uses less digits than its factorization.

138676670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7240.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 138676670 is about 11776.1058928663. The cubic root of 138676670 is about 517.6081844971.

The spelling of 138676670 in words is "one hundred thirty-eight million, six hundred seventy-six thousand, six hundred seventy".