130405646 has 16 divisors (see below), whose sum is σ = 223726560. Its totient is φ = 55844640.

The previous prime is 130405643. The next prime is 130405687. The reversal of 130405646 is 646504031.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130405643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20576 + ... + 26156.

It is an arithmetic number, because the mean of its divisors is an integer number (13982910).

Almost surely, 2^130405646 is an apocalyptic number.

130405646 is a deficient number, since it is larger than the sum of its proper divisors (93320914).

130405646 is a wasteful number, since it uses less digits than its factorization.

130405646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 130405646 is about 11419.5291496629. The cubic root of 130405646 is about 507.1060574577.

Adding to 130405646 its reverse (646504031), we get a palindrome (776909677).

The spelling of 130405646 in words is "one hundred thirty million, four hundred five thousand, six hundred forty-six".