123442998 has 16 divisors (see below), whose sum is σ = 282155520. Its totient is φ = 35269416.

The previous prime is 123442987. The next prime is 123443027. The reversal of 123442998 is 899244321.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 2939119 = 123442998 / (1 + 2 + 3 + 4 + 4 + 2 + 9 + 9 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1469518 + ... + 1469601.

It is an arithmetic number, because the mean of its divisors is an integer number (17634720).

Almost surely, 2^123442998 is an apocalyptic number.

123442998 is an abundant number, since it is smaller than the sum of its proper divisors (158712522).

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

123442998 is a wasteful number, since it uses less digits than its factorization.

123442998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939131.

The product of its digits is 124416, while the sum is 42.

The square root of 123442998 is about 11110.4904482205. The cubic root of 123442998 is about 497.9153176118.

The spelling of 123442998 in words is "one hundred twenty-three million, four hundred forty-two thousand, nine hundred ninety-eight".