138426530 has 16 divisors (see below), whose sum is σ = 271819584. Its totient is φ = 50336880.

The previous prime is 138426511. The next prime is 138426539. The reversal of 138426530 is 35624831.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138426539) 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, 629102 + ... + 629321.

It is an arithmetic number, because the mean of its divisors is an integer number (16988724).

Almost surely, 2^138426530 is an apocalyptic number.

138426530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138426530 is a deficient number, since it is larger than the sum of its proper divisors (133393054).

138426530 is a wasteful number, since it uses less digits than its factorization.

138426530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258441.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 138426530 is about 11765.4804406790. The cubic root of 138426530 is about 517.2967828352.

The spelling of 138426530 in words is "one hundred thirty-eight million, four hundred twenty-six thousand, five hundred thirty".