130918840 has 64 divisors (see below), whose sum is σ = 318931200. Its totient is φ = 48079872.

The previous prime is 130918831. The next prime is 130918841. The reversal of 130918840 is 48819031.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 130918796 and 130918805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130918841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115396 + ... + 116524.

It is an arithmetic number, because the mean of its divisors is an integer number (4983300).

Almost surely, 2^130918840 is an apocalyptic number.

130918840 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 130918840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159465600).

130918840 is an abundant number, since it is smaller than the sum of its proper divisors (188012360).

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

130918840 is a wasteful number, since it uses less digits than its factorization.

130918840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 130918840 is about 11441.9771018823. The cubic root of 130918840 is about 507.7704027872.

The spelling of 130918840 in words is "one hundred thirty million, nine hundred eighteen thousand, eight hundred forty".