130888440 has 128 divisors (see below), whose sum is σ = 462024000. Its totient is φ = 32845824.

The previous prime is 130888409. The next prime is 130888447. The reversal of 130888440 is 44888031.

130888440 is a `hidden beast` number, since 130 + 8 + 88 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 130888395 and 130888404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130888447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14796 + ... + 21924.

Almost surely, 2^130888440 is an apocalyptic number.

130888440 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 130888440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231012000).

130888440 is an abundant number, since it is smaller than the sum of its proper divisors (331135560).

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

130888440 is a wasteful number, since it uses less digits than its factorization.

130888440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7166 (or 7156 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 130888440 is about 11440.6485830131. The cubic root of 130888440 is about 507.7310974812.

It can be divided in two parts, 130888 and 440, that added together give a triangular number (131328 = T₅₁₂).

The spelling of 130888440 in words is "one hundred thirty million, eight hundred eighty-eight thousand, four hundred forty".