130233440 has 48 divisors (see below), whose sum is σ = 310761360. Its totient is φ = 51571200.

The previous prime is 130233437. The next prime is 130233457. The reversal of 130233440 is 44332031.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12131 + ... + 20189.

It is an arithmetic number, because the mean of its divisors is an integer number (6474195).

Almost surely, 2^130233440 is an apocalyptic number.

130233440 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 130233440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155380680).

130233440 is an abundant number, since it is smaller than the sum of its proper divisors (180527920).

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

130233440 is a wasteful number, since it uses less digits than its factorization.

130233440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8175 (or 8167 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 130233440 is about 11411.9866806792. The cubic root of 130233440 is about 506.8827410187.

Adding to 130233440 its reverse (44332031), we get a palindrome (174565471).

The spelling of 130233440 in words is "one hundred thirty million, two hundred thirty-three thousand, four hundred forty".