138442010 has 16 divisors (see below), whose sum is σ = 284795136. Its totient is φ = 47465808.

The previous prime is 138441949. The next prime is 138442021. The reversal of 138442010 is 10244831.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988802 + ... + 988941.

It is an arithmetic number, because the mean of its divisors is an integer number (17799696).

Almost surely, 2^138442010 is an apocalyptic number.

138442010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138442010 is an abundant number, since it is smaller than the sum of its proper divisors (146353126).

138442010 is a wasteful number, since it uses less digits than its factorization.

138442010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977757.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 138442010 is about 11766.1382789767. The cubic root of 138442010 is about 517.3160649187.

Adding to 138442010 its reverse (10244831), we get a palindrome (148686841).

The spelling of 138442010 in words is "one hundred thirty-eight million, four hundred forty-two thousand, ten".