138658050 has 36 divisors (see below), whose sum is σ = 372529170. Its totient is φ = 36975360.

The previous prime is 138658033. The next prime is 138658073. The reversal of 138658050 is 50856831.

It can be written as a sum of positive squares in 3 ways, for example, as 116445681 + 22212369 = 10791^2 + 4713^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138657996 and 138658014.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 153615 + ... + 154514.

Almost surely, 2^138658050 is an apocalyptic number.

138658050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138658050 is an abundant number, since it is smaller than the sum of its proper divisors (233871120).

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

138658050 is a wasteful number, since it uses less digits than its factorization.

138658050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308147 (or 308139 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 138658050 is about 11775.3152824033. The cubic root of 138658050 is about 517.5850171882.

The spelling of 138658050 in words is "one hundred thirty-eight million, six hundred fifty-eight thousand, fifty".