139673228 has 12 divisors (see below), whose sum is σ = 252313152. Its totient is φ = 67583760.

The previous prime is 139673213. The next prime is 139673257. The reversal of 139673228 is 822376931.

It is a super-2 number, since 2×139673228² = 39017221239879968, which contains 22 as substring.

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, 563075 + ... + 563322.

It is an arithmetic number, because the mean of its divisors is an integer number (21026096).

Almost surely, 2^139673228 is an apocalyptic number.

It is an amenable number.

139673228 is a deficient number, since it is larger than the sum of its proper divisors (112639924).

139673228 is a wasteful number, since it uses less digits than its factorization.

139673228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126432 (or 1126430 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 139673228 is about 11818.3428618398. The cubic root of 139673228 is about 518.8451045836.

The spelling of 139673228 in words is "one hundred thirty-nine million, six hundred seventy-three thousand, two hundred twenty-eight".