139784228 has 12 divisors (see below), whose sum is σ = 250311600. Its totient is φ = 68266632.

The previous prime is 139784221. The next prime is 139784233. The reversal of 139784228 is 822487931.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (139784221) 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, 406178 + ... + 406521.

It is an arithmetic number, because the mean of its divisors is an integer number (20859300).

Almost surely, 2^139784228 is an apocalyptic number.

It is an amenable number.

139784228 is a deficient number, since it is larger than the sum of its proper divisors (110527372).

139784228 is a wasteful number, since it uses less digits than its factorization.

139784228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812746 (or 812744 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 139784228 is about 11823.0380190542. The cubic root of 139784228 is about 518.9825123457.

The spelling of 139784228 in words is "one hundred thirty-nine million, seven hundred eighty-four thousand, two hundred twenty-eight".