138302474 has 8 divisors (see below), whose sum is σ = 208368288. Its totient is φ = 68846380.

The previous prime is 138302467. The next prime is 138302477. The reversal of 138302474 is 474203831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138302474.

It is not an unprimeable number, because it can be changed into a prime (138302477) 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 3 ways as a sum of consecutive naturals, for example, 151862 + ... + 152769.

It is an arithmetic number, because the mean of its divisors is an integer number (26046036).

Almost surely, 2^138302474 is an apocalyptic number.

138302474 is a deficient number, since it is larger than the sum of its proper divisors (70065814).

138302474 is a wasteful number, since it uses less digits than its factorization.

138302474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304860.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 138302474 is about 11760.2072260654. The cubic root of 138302474 is about 517.1422051691.

The spelling of 138302474 in words is "one hundred thirty-eight million, three hundred two thousand, four hundred seventy-four".