138199288 has 32 divisors (see below), whose sum is σ = 262440000. Its totient is φ = 68222080.

The previous prime is 138199283. The next prime is 138199351. The reversal of 138199288 is 882991831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138199283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320433 + ... + 320863.

It is an arithmetic number, because the mean of its divisors is an integer number (8201250).

Almost surely, 2^138199288 is an apocalyptic number.

It is an amenable number.

138199288 is a deficient number, since it is larger than the sum of its proper divisors (124240712).

138199288 is a wasteful number, since it uses less digits than its factorization.

138199288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 851 counting only the distinct ones).

The product of its digits is 248832, while the sum is 49.

The square root of 138199288 is about 11755.8193249131. The cubic root of 138199288 is about 517.0135617437.

The spelling of 138199288 in words is "one hundred thirty-eight million, one hundred ninety-nine thousand, two hundred eighty-eight".