123449130 has 256 divisors, whose sum is σ = 405504000. Its totient is φ = 26671680.

The previous prime is 123449129. The next prime is 123449147. The reversal of 123449130 is 31944321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 123449094 and 123449103.

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 127 ways as a sum of consecutive naturals, for example, 2870889 + ... + 2870931.

It is an arithmetic number, because the mean of its divisors is an integer number (1584000).

Almost surely, 2^123449130 is an apocalyptic number.

123449130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123449130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202752000).

123449130 is an abundant number, since it is smaller than the sum of its proper divisors (282054870).

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

123449130 is a wasteful number, since it uses less digits than its factorization.

123449130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 123449130 is about 11110.7664002084. The cubic root of 123449130 is about 497.9235620815.

The spelling of 123449130 in words is "one hundred twenty-three million, four hundred forty-nine thousand, one hundred thirty".