139428292 has 12 divisors (see below), whose sum is σ = 244701100. Its totient is φ = 69513696.

The previous prime is 139428257. The next prime is 139428299. The reversal of 139428292 is 292824931.

It can be written as a sum of positive squares in 2 ways, for example, as 104571076 + 34857216 = 10226^2 + 5904^2 .

It is a super-2 number, since 2×139428292² = 38880497220074528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139428299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48543 + ... + 51334.

Almost surely, 2^139428292 is an apocalyptic number.

It is an amenable number.

139428292 is a deficient number, since it is larger than the sum of its proper divisors (105272808).

139428292 is a wasteful number, since it uses less digits than its factorization.

139428292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100230 (or 100228 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 139428292 is about 11807.9757791080. The cubic root of 139428292 is about 518.5416386413.

The spelling of 139428292 in words is "one hundred thirty-nine million, four hundred twenty-eight thousand, two hundred ninety-two".