138135650 has 12 divisors (see below), whose sum is σ = 256932402. Its totient is φ = 55254240.

The previous prime is 138135619. The next prime is 138135667. The reversal of 138135650 is 56531831.

It can be written as a sum of positive squares in 3 ways, for example, as 124791241 + 13344409 = 11171^2 + 3653^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1381307 + ... + 1381406.

Almost surely, 2^138135650 is an apocalyptic number.

138135650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138135650 is a deficient number, since it is larger than the sum of its proper divisors (118796752).

138135650 is a wasteful number, since it uses less digits than its factorization.

138135650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762725 (or 2762720 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 138135650 is about 11753.1123537555. The cubic root of 138135650 is about 516.9341914348.

The spelling of 138135650 in words is "one hundred thirty-eight million, one hundred thirty-five thousand, six hundred fifty".