123866000 has 40 divisors (see below), whose sum is σ = 299512824. Its totient is φ = 49545600.

The previous prime is 123865991. The next prime is 123866003. The reversal of 123866000 is 668321.

It can be written as a sum of positive squares in 4 ways, for example, as 7139584 + 116726416 = 2672^2 + 10804^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (123866003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28967 + ... + 32966.

Almost surely, 2^123866000 is an apocalyptic number.

123866000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123866000 is an abundant number, since it is smaller than the sum of its proper divisors (175646824).

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

123866000 is an equidigital number, since it uses as much as digits as its factorization.

123866000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61956 (or 61940 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 123866000 is about 11129.5103216629. The cubic root of 123866000 is about 498.4834045274.

The spelling of 123866000 in words is "one hundred twenty-three million, eight hundred sixty-six thousand".