138462286 has 4 divisors (see below), whose sum is σ = 207693432. Its totient is φ = 69231142.

The previous prime is 138462281. The next prime is 138462307. The reversal of 138462286 is 682264831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 682264831 = 47 ⋅14516273.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138462281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34615570 + ... + 34615573.

It is an arithmetic number, because the mean of its divisors is an integer number (51923358).

Almost surely, 2^138462286 is an apocalyptic number.

138462286 is a deficient number, since it is larger than the sum of its proper divisors (69231146).

138462286 is an equidigital number, since it uses as much as digits as its factorization.

138462286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69231145.

The product of its digits is 110592, while the sum is 40.

The square root of 138462286 is about 11766.9998725249. Note that the first 3 decimals coincide. The cubic root of 138462286 is about 517.3413187861.

The spelling of 138462286 in words is "one hundred thirty-eight million, four hundred sixty-two thousand, two hundred eighty-six".