139881228 has 24 divisors (see below), whose sum is σ = 330324288. Its totient is φ = 46064976.

The previous prime is 139881227. The next prime is 139881277. The reversal of 139881228 is 822188931.

It is a self number, because there is not a number n which added to its sum of digits gives 139881228.

It is not an unprimeable number, because it can be changed into a prime (139881223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69226 + ... + 71217.

It is an arithmetic number, because the mean of its divisors is an integer number (13763512).

Almost surely, 2^139881228 is an apocalyptic number.

It is an amenable number.

139881228 is an abundant number, since it is smaller than the sum of its proper divisors (190443060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139881228 is a wasteful number, since it uses less digits than its factorization.

139881228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140533 (or 140531 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 139881228 is about 11827.1394681893. The cubic root of 139881228 is about 519.1025298529.

The spelling of 139881228 in words is "one hundred thirty-nine million, eight hundred eighty-one thousand, two hundred twenty-eight".