123978498 has 32 divisors (see below), whose sum is σ = 283785216. Its totient is φ = 35371728.

The previous prime is 123978497. The next prime is 123978499. The reversal of 123978498 is 894879321.

It is an interprime number because it is at equal distance from previous prime (123978497) and next prime (123978499).

It is a self number, because there is not a number n which added to its sum of digits gives 123978498.

It is not an unprimeable number, because it can be changed into a prime (123978493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35415 + ... + 38757.

It is an arithmetic number, because the mean of its divisors is an integer number (8868288).

Almost surely, 2^123978498 is an apocalyptic number.

123978498 is an abundant number, since it is smaller than the sum of its proper divisors (159806718).

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

123978498 is a wasteful number, since it uses less digits than its factorization.

123978498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238.

The product of its digits is 870912, while the sum is 51.

The square root of 123978498 is about 11134.5632155015. The cubic root of 123978498 is about 498.6342702946.

The spelling of 123978498 in words is "one hundred twenty-three million, nine hundred seventy-eight thousand, four hundred ninety-eight".