123428494 has 16 divisors (see below), whose sum is σ = 214272000. Its totient is φ = 52227864.

The previous prime is 123428479. The next prime is 123428509. The reversal of 123428494 is 494824321.

It is an interprime number because it is at equal distance from previous prime (123428479) and next prime (123428509).

It is a super-3 number, since 3×123428494³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 54694 + ... + 56905.

It is an arithmetic number, because the mean of its divisors is an integer number (13392000).

Almost surely, 2^123428494 is an apocalyptic number.

123428494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

123428494 is a deficient number, since it is larger than the sum of its proper divisors (90843506).

123428494 is a wasteful number, since it uses less digits than its factorization.

123428494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111687.

The product of its digits is 55296, while the sum is 37.

The square root of 123428494 is about 11109.8377125861. The cubic root of 123428494 is about 497.8958159072.

The spelling of 123428494 in words is "one hundred twenty-three million, four hundred twenty-eight thousand, four hundred ninety-four".