123597980 has 24 divisors (see below), whose sum is σ = 283152240. Its totient is φ = 44944640.

The previous prime is 123597977. The next prime is 123598003. The reversal of 123597980 is 89795321.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 280685 + ... + 281124.

It is an arithmetic number, because the mean of its divisors is an integer number (11798010).

Almost surely, 2^123597980 is an apocalyptic number.

123597980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123597980 is an abundant number, since it is smaller than the sum of its proper divisors (159554260).

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

123597980 is a wasteful number, since it uses less digits than its factorization.

123597980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561829 (or 561827 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 123597980 is about 11117.4628400548. The cubic root of 123597980 is about 498.1236071081.

The spelling of 123597980 in words is "one hundred twenty-three million, five hundred ninety-seven thousand, nine hundred eighty".