123051440 has 80 divisors (see below), whose sum is σ = 305257248. Its totient is φ = 45969408.

The previous prime is 123051413. The next prime is 123051469. The reversal of 123051440 is 44150321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235019 + ... + 235541.

Almost surely, 2^123051440 is an apocalyptic number.

123051440 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 123051440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152628624).

123051440 is an abundant number, since it is smaller than the sum of its proper divisors (182205808).

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

123051440 is a wasteful number, since it uses less digits than its factorization.

123051440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 123051440 is about 11092.8553582926. The cubic root of 123051440 is about 497.3883018176.

The spelling of 123051440 in words is "one hundred twenty-three million, fifty-one thousand, four hundred forty".