130656240 has 480 divisors, whose sum is σ = 545965056. Its totient is φ = 28615680.

The previous prime is 130656209. The next prime is 130656241. The reversal of 130656240 is 42656031.

130656240 is a `hidden beast` number, since 1 + 3 + 0 + 656 + 2 + 4 + 0 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130656241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2779897 + ... + 2779943.

Almost surely, 2^130656240 is an apocalyptic number.

130656240 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 130656240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272982528).

130656240 is an abundant number, since it is smaller than the sum of its proper divisors (415308816).

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

130656240 is a wasteful number, since it uses less digits than its factorization.

130656240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 130656240 is about 11430.4960522280. The cubic root of 130656240 is about 507.4306763844.

The spelling of 130656240 in words is "one hundred thirty million, six hundred fifty-six thousand, two hundred forty".