138669286 has 8 divisors (see below), whose sum is σ = 237718800. Its totient is φ = 59429688.

The previous prime is 138669269. The next prime is 138669301. The reversal of 138669286 is 682966831.

It is a happy number.

138669286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4952461 + ... + 4952488.

It is an arithmetic number, because the mean of its divisors is an integer number (29714850).

Almost surely, 2^138669286 is an apocalyptic number.

138669286 is a deficient number, since it is larger than the sum of its proper divisors (99049514).

138669286 is an equidigital number, since it uses as much as digits as its factorization.

138669286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9904958.

The product of its digits is 746496, while the sum is 49.

The square root of 138669286 is about 11775.7923724903. The cubic root of 138669286 is about 517.5989974515.

The spelling of 138669286 in words is "one hundred thirty-eight million, six hundred sixty-nine thousand, two hundred eighty-six".