138021070 has 24 divisors (see below), whose sum is σ = 273078792. Its totient is φ = 50189040.

The previous prime is 138021053. The next prime is 138021109. The reversal of 138021070 is 70120831.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 11 ways as a sum of consecutive naturals, for example, 55824 + ... + 58243.

It is an arithmetic number, because the mean of its divisors is an integer number (11378283).

Almost surely, 2^138021070 is an apocalyptic number.

138021070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138021070 is a deficient number, since it is larger than the sum of its proper divisors (135057722).

138021070 is a wasteful number, since it uses less digits than its factorization.

138021070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114096 (or 114085 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 138021070 is about 11748.2368889974. The cubic root of 138021070 is about 516.7912239873.

The spelling of 138021070 in words is "one hundred thirty-eight million, twenty-one thousand, seventy".