123197428 has 24 divisors (see below), whose sum is σ = 222284160. Its totient is φ = 59716800.

The previous prime is 123197411. The next prime is 123197443. The reversal of 123197428 is 824791321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13653 + ... + 20803.

It is an arithmetic number, because the mean of its divisors is an integer number (9261840).

Almost surely, 2^123197428 is an apocalyptic number.

It is an amenable number.

123197428 is a deficient number, since it is larger than the sum of its proper divisors (99086732).

123197428 is a wasteful number, since it uses less digits than its factorization.

123197428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7287 (or 7285 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 123197428 is about 11099.4336792469. The cubic root of 123197428 is about 497.5849242666.

The spelling of 123197428 in words is "one hundred twenty-three million, one hundred ninety-seven thousand, four hundred twenty-eight".