138283770 has 32 divisors (see below), whose sum is σ = 332359488. Its totient is φ = 36822528.

The previous prime is 138283759. The next prime is 138283793. The reversal of 138283770 is 77382831.

138283770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20682 + ... + 26538.

It is an arithmetic number, because the mean of its divisors is an integer number (10386234).

Almost surely, 2^138283770 is an apocalyptic number.

138283770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138283770 is an abundant number, since it is smaller than the sum of its proper divisors (194075718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138283770 is a wasteful number, since it uses less digits than its factorization.

138283770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6654.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 138283770 is about 11759.4119750947. The cubic root of 138283770 is about 517.1188913806.

The spelling of 138283770 in words is "one hundred thirty-eight million, two hundred eighty-three thousand, seven hundred seventy".