123489700 has 54 divisors (see below), whose sum is σ = 284729606. Its totient is φ = 46479360.

The previous prime is 123489673. The next prime is 123489701. The reversal of 123489700 is 7984321.

It can be written as a sum of positive squares in 9 ways, for example, as 15163236 + 108326464 = 3894^2 + 10408^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (123489701) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26764 + ... + 31036.

Almost surely, 2^123489700 is an apocalyptic number.

123489700 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 123489700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142364803).

123489700 is an abundant number, since it is smaller than the sum of its proper divisors (161239906).

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

123489700 is a wasteful number, since it uses less digits than its factorization.

123489700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321 (or 4297 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 123489700 is about 11112.5919568749. The cubic root of 123489700 is about 497.9781015408.

The spelling of 123489700 in words is "one hundred twenty-three million, four hundred eighty-nine thousand, seven hundred".