138730570 has 32 divisors (see below), whose sum is σ = 275135616. Its totient is φ = 49944000.

The previous prime is 138730567. The next prime is 138730573. The reversal of 138730570 is 75037831.

It is an interprime number because it is at equal distance from previous prime (138730567) and next prime (138730573).

It is not an unprimeable number, because it can be changed into a prime (138730573) by changing a digit.

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, 4867 + ... + 17353.

It is an arithmetic number, because the mean of its divisors is an integer number (8597988).

Almost surely, 2^138730570 is an apocalyptic number.

138730570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138730570 is a deficient number, since it is larger than the sum of its proper divisors (136405046).

138730570 is a wasteful number, since it uses less digits than its factorization.

138730570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12606.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 138730570 is about 11778.3942029463. The cubic root of 138730570 is about 517.6752360720.

The spelling of 138730570 in words is "one hundred thirty-eight million, seven hundred thirty thousand, five hundred seventy".