122839930 has 16 divisors (see below), whose sum is σ = 222065064. Its totient is φ = 48924160.

The previous prime is 122839907. The next prime is 122839939. The reversal of 122839930 is 39938221.

It can be written as a sum of positive squares in 4 ways, for example, as 51825601 + 71014329 = 7199^2 + 8427^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 122839930.

It is not an unprimeable number, because it can be changed into a prime (122839939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24031 + ... + 28690.

Almost surely, 2^122839930 is an apocalyptic number.

122839930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122839930 is a deficient number, since it is larger than the sum of its proper divisors (99225134).

122839930 is a wasteful number, since it uses less digits than its factorization.

122839930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52961.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 122839930 is about 11083.3176440992. The cubic root of 122839930 is about 497.1031556651.

The spelling of 122839930 in words is "one hundred twenty-two million, eight hundred thirty-nine thousand, nine hundred thirty".