138090770 has 16 divisors (see below), whose sum is σ = 248977368. Its totient is φ = 55144320.

The previous prime is 138090769. The next prime is 138090773. The reversal of 138090770 is 77090831.

It can be written as a sum of positive squares in 4 ways, for example, as 78198649 + 59892121 = 8843^2 + 7739^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138090770.

It is not an unprimeable number, because it can be changed into a prime (138090773) 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 7 ways as a sum of consecutive naturals, for example, 5021 + ... + 17360.

Almost surely, 2^138090770 is an apocalyptic number.

138090770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138090770 is a deficient number, since it is larger than the sum of its proper divisors (110886598).

138090770 is a wasteful number, since it uses less digits than its factorization.

138090770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23005.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 138090770 is about 11751.2029171485. The cubic root of 138090770 is about 516.8782017380.

The spelling of 138090770 in words is "one hundred thirty-eight million, ninety thousand, seven hundred seventy".