139228785 has 12 divisors (see below), whose sum is σ = 241329972. Its totient is φ = 74255328.

The previous prime is 139228783. The next prime is 139228801. The reversal of 139228785 is 587822931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74442384 + 64786401 = 8628^2 + 8049^2 .

It is not a de Polignac number, because 139228785 - 2¹ = 139228783 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 3093973 = 139228785 / (1 + 3 + 9 + 2 + 2 + 8 + 7 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 139228785.

It is not an unprimeable number, because it can be changed into a prime (139228783) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1546942 + ... + 1547031.

It is an arithmetic number, because the mean of its divisors is an integer number (20110831).

Almost surely, 2^139228785 is an apocalyptic number.

139228785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139228785 is a deficient number, since it is larger than the sum of its proper divisors (102101187).

139228785 is a wasteful number, since it uses less digits than its factorization.

139228785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3093984 (or 3093981 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 139228785 is about 11799.5247785663. The cubic root of 139228785 is about 518.2941946739.

The spelling of 139228785 in words is "one hundred thirty-nine million, two hundred twenty-eight thousand, seven hundred eighty-five".