130445040 has 80 divisors (see below), whose sum is σ = 441150336. Its totient is φ = 31622400.

The previous prime is 130445009. The next prime is 130445057. The reversal of 130445040 is 40544031.

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

It is a junction number, because it is equal to n+sod(n) for n = 130444998 and 130445016.

It is a congruent number.

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, 22066 + ... + 27345.

Almost surely, 2^130445040 is an apocalyptic number.

130445040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130445040 is an abundant number, since it is smaller than the sum of its proper divisors (310705296).

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

130445040 is a wasteful number, since it uses less digits than its factorization.

130445040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49438 (or 49432 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 130445040 is about 11421.2538716202. The cubic root of 130445040 is about 507.1571158931.

Adding to 130445040 its reverse (40544031), we get a palindrome (170989071).

The spelling of 130445040 in words is "one hundred thirty million, four hundred forty-five thousand, forty".