123997800 has 192 divisors, whose sum is σ = 412920000. Its totient is φ = 30689280.

The previous prime is 123997759. The next prime is 123997829. The reversal of 123997800 is 8799321.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 832126 + ... + 832274.

It is an arithmetic number, because the mean of its divisors is an integer number (2150625).

Almost surely, 2^123997800 is an apocalyptic number.

123997800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123997800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206460000).

123997800 is an abundant number, since it is smaller than the sum of its proper divisors (288922200).

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

123997800 is a wasteful number, since it uses less digits than its factorization.

123997800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 123997800 is about 11135.4299423058. The cubic root of 123997800 is about 498.6601461236.

The spelling of 123997800 in words is "one hundred twenty-three million, nine hundred ninety-seven thousand, eight hundred".