130123640 has 16 divisors (see below), whose sum is σ = 292778280. Its totient is φ = 52049440.

The previous prime is 130123621. The next prime is 130123687. The reversal of 130123640 is 46321031.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1626506 + ... + 1626585.

Almost surely, 2^130123640 is an apocalyptic number.

130123640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130123640 is an abundant number, since it is smaller than the sum of its proper divisors (162654640).

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

130123640 is a wasteful number, since it uses less digits than its factorization.

130123640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253102 (or 3253098 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 130123640 is about 11407.1749351012. The cubic root of 130123640 is about 506.7402497778.

Adding to 130123640 its reverse (46321031), we get a palindrome (176444671).

The spelling of 130123640 in words is "one hundred thirty million, one hundred twenty-three thousand, six hundred forty".