122927638 has 4 divisors (see below), whose sum is σ = 184391460. Its totient is φ = 61463818.

The previous prime is 122927633. The next prime is 122927639. The reversal of 122927638 is 836729221.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×122927638² = 30222408368518088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 122927638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122927633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30731908 + ... + 30731911.

It is an arithmetic number, because the mean of its divisors is an integer number (46097865).

Almost surely, 2^122927638 is an apocalyptic number.

122927638 is a deficient number, since it is larger than the sum of its proper divisors (61463822).

122927638 is an equidigital number, since it uses as much as digits as its factorization.

122927638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61463821.

The product of its digits is 72576, while the sum is 40.

The square root of 122927638 is about 11087.2736955484. The cubic root of 122927638 is about 497.2214384604.

The spelling of 122927638 in words is "one hundred twenty-two million, nine hundred twenty-seven thousand, six hundred thirty-eight".