138531070 has 16 divisors (see below), whose sum is σ = 260197920. Its totient is φ = 53003104.

The previous prime is 138531053. The next prime is 138531073. The reversal of 138531070 is 70135831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138531073) by changing a digit.

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, 300925 + ... + 301384.

It is an arithmetic number, because the mean of its divisors is an integer number (16262370).

Almost surely, 2^138531070 is an apocalyptic number.

138531070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138531070 is a deficient number, since it is larger than the sum of its proper divisors (121666850).

138531070 is a wasteful number, since it uses less digits than its factorization.

138531070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602339.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 138531070 is about 11769.9222597263. The cubic root of 138531070 is about 517.4269712657.

The spelling of 138531070 in words is "one hundred thirty-eight million, five hundred thirty-one thousand, seventy".