139092228 has 72 divisors (see below), whose sum is σ = 397793760. Its totient is φ = 42145920.

The previous prime is 139092227. The next prime is 139092259. The reversal of 139092228 is 822290931.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 139092192 and 139092201.

It is not an unprimeable number, because it can be changed into a prime (139092221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4188 + ... + 17196.

Almost surely, 2^139092228 is an apocalyptic number.

139092228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139092228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198896880).

139092228 is an abundant number, since it is smaller than the sum of its proper divisors (258701532).

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

139092228 is a wasteful number, since it uses less digits than its factorization.

139092228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13039 (or 13025 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 139092228 is about 11793.7368123933. The cubic root of 139092228 is about 518.1246898490.

The spelling of 139092228 in words is "one hundred thirty-nine million, ninety-two thousand, two hundred twenty-eight".