130235840 has 112 divisors (see below), whose sum is σ = 361444032. Its totient is φ = 43769856.

The previous prime is 130235801. The next prime is 130235849. The reversal of 130235840 is 48532031.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×130235840² = 33922748041011200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130235849) 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, 118172 + ... + 119268.

Almost surely, 2^130235840 is an apocalyptic number.

130235840 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 130235840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180722016).

130235840 is an abundant number, since it is smaller than the sum of its proper divisors (231208192).

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

130235840 is a wasteful number, since it uses less digits than its factorization.

130235840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 130235840 is about 11412.0918327886. The cubic root of 130235840 is about 506.8858546868.

Adding to 130235840 its reverse (48532031), we get a palindrome (178767871).

The spelling of 130235840 in words is "one hundred thirty million, two hundred thirty-five thousand, eight hundred forty".