138029250 has 32 divisors (see below), whose sum is σ = 344522880. Its totient is φ = 36807600.

The previous prime is 138029231. The next prime is 138029257. The reversal of 138029250 is 52920831.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (138029257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91270 + ... + 92769.

It is an arithmetic number, because the mean of its divisors is an integer number (10766340).

Almost surely, 2^138029250 is an apocalyptic number.

138029250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138029250 is an abundant number, since it is smaller than the sum of its proper divisors (206493630).

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

138029250 is a wasteful number, since it uses less digits than its factorization.

138029250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184059 (or 184049 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 138029250 is about 11748.5850211845. The cubic root of 138029250 is about 516.8014332225.

The spelling of 138029250 in words is "one hundred thirty-eight million, twenty-nine thousand, two hundred fifty".