138562026 has 16 divisors (see below), whose sum is σ = 280463904. Its totient is φ = 45630704.

The previous prime is 138562013. The next prime is 138562027. The reversal of 138562026 is 620265831.

It is not an unprimeable number, because it can be changed into a prime (138562027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138621 + ... + 139616.

It is an arithmetic number, because the mean of its divisors is an integer number (17528994).

Almost surely, 2^138562026 is an apocalyptic number.

138562026 is an abundant number, since it is smaller than the sum of its proper divisors (141901878).

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

138562026 is a wasteful number, since it uses less digits than its factorization.

138562026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278325.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 138562026 is about 11771.2372331884. The cubic root of 138562026 is about 517.4655096153.

The spelling of 138562026 in words is "one hundred thirty-eight million, five hundred sixty-two thousand, twenty-six".