139828666 has 8 divisors (see below), whose sum is σ = 214205760. Its totient is φ = 68426748.

The previous prime is 139828649. The next prime is 139828669. The reversal of 139828666 is 666828931.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (139828669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743676 + ... + 743863.

It is an arithmetic number, because the mean of its divisors is an integer number (26775720).

Almost surely, 2^139828666 is an apocalyptic number.

139828666 is a deficient number, since it is larger than the sum of its proper divisors (74377094).

139828666 is a wasteful number, since it uses less digits than its factorization.

139828666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487588.

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

The square root of 139828666 is about 11824.9171667289. The cubic root of 139828666 is about 519.0375021009.

The spelling of 139828666 in words is "one hundred thirty-nine million, eight hundred twenty-eight thousand, six hundred sixty-six".