130281778 has 48 divisors (see below), whose sum is σ = 234125568. Its totient is φ = 53856000.

The previous prime is 130281769. The next prime is 130281779. The reversal of 130281778 is 877182031.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (130281779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196768 + ... + 197428.

It is an arithmetic number, because the mean of its divisors is an integer number (4877616).

Almost surely, 2^130281778 is an apocalyptic number.

130281778 is a deficient number, since it is larger than the sum of its proper divisors (103843790).

130281778 is a wasteful number, since it uses less digits than its factorization.

130281778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 130281778 is about 11414.1043450636. The cubic root of 130281778 is about 506.9454455161.

The spelling of 130281778 in words is "one hundred thirty million, two hundred eighty-one thousand, seven hundred seventy-eight".