138203650 has 48 divisors (see below), whose sum is σ = 280060200. Its totient is φ = 50434560.

The previous prime is 138203629. The next prime is 138203657. The reversal of 138203650 is 56302831.

It can be written as a sum of positive squares in 12 ways, for example, as 8767521 + 129436129 = 2961^2 + 11377^2 .

It is not an unprimeable number, because it can be changed into a prime (138203657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56656 + ... + 59044.

Almost surely, 2^138203650 is an apocalyptic number.

138203650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138203650 is an abundant number, since it is smaller than the sum of its proper divisors (141856550).

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

138203650 is a wasteful number, since it uses less digits than its factorization.

138203650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503 (or 2498 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 138203650 is about 11756.0048485870. The cubic root of 138203650 is about 517.0190012059.

The spelling of 138203650 in words is "one hundred thirty-eight million, two hundred three thousand, six hundred fifty".