138201424 has 20 divisors (see below), whose sum is σ = 268012980. Its totient is φ = 69036800.

The previous prime is 138201419. The next prime is 138201439. The reversal of 138201424 is 424102831.

It can be written as a sum of positive squares in 2 ways, for example, as 85377600 + 52823824 = 9240^2 + 7268^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17274 + ... + 23974.

It is an arithmetic number, because the mean of its divisors is an integer number (13400649).

Almost surely, 2^138201424 is an apocalyptic number.

It is an amenable number.

138201424 is a deficient number, since it is larger than the sum of its proper divisors (129811556).

138201424 is a wasteful number, since it uses less digits than its factorization.

138201424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998 (or 7992 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 138201424 is about 11755.9101731852. The cubic root of 138201424 is about 517.0162253736.

The spelling of 138201424 in words is "one hundred thirty-eight million, two hundred one thousand, four hundred twenty-four".