139621228 has 12 divisors (see below), whose sum is σ = 245688352. Its totient is φ = 69424560.

The previous prime is 139621219. The next prime is 139621249. The reversal of 139621228 is 822126931.

It is a junction number, because it is equal to n+sod(n) for n = 139621193 and 139621202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95700 + ... + 97147.

Almost surely, 2^139621228 is an apocalyptic number.

It is an amenable number.

139621228 is a deficient number, since it is larger than the sum of its proper divisors (106067124).

139621228 is a wasteful number, since it uses less digits than its factorization.

139621228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193032 (or 193030 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 139621228 is about 11816.1426870193. The cubic root of 139621228 is about 518.7807083384.

The spelling of 139621228 in words is "one hundred thirty-nine million, six hundred twenty-one thousand, two hundred twenty-eight".