123052440 has 128 divisors (see below), whose sum is σ = 424258560. Its totient is φ = 27969024.

The previous prime is 123052427. The next prime is 123052453. The reversal of 123052440 is 44250321.

It is an interprime number because it is at equal distance from previous prime (123052427) and next prime (123052453).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220642 + ... + 221198.

It is an arithmetic number, because the mean of its divisors is an integer number (3314520).

Almost surely, 2^123052440 is an apocalyptic number.

123052440 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 123052440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212129280).

123052440 is an abundant number, since it is smaller than the sum of its proper divisors (301206120).

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

123052440 is a wasteful number, since it uses less digits than its factorization.

123052440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 123052440 is about 11092.9004322585. The cubic root of 123052440 is about 497.3896491863.

The spelling of 123052440 in words is "one hundred twenty-three million, fifty-two thousand, four hundred forty".