305405132 has 12 divisors (see below), whose sum is σ = 557696496. Its totient is φ = 146063280.

The previous prime is 305405077. The next prime is 305405143. The reversal of 305405132 is 231504503.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 305405098 and 305405107.

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, 1659719 + ... + 1659902.

It is an arithmetic number, because the mean of its divisors is an integer number (46474708).

Almost surely, 2^305405132 is an apocalyptic number.

It is an amenable number.

305405132 is a deficient number, since it is larger than the sum of its proper divisors (252291364).

305405132 is a wasteful number, since it uses less digits than its factorization.

305405132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319648 (or 3319646 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 305405132 is about 17475.8442428399. The cubic root of 305405132 is about 673.4294584416.

Adding to 305405132 its reverse (231504503), we get a palindrome (536909635).

The spelling of 305405132 in words is "three hundred five million, four hundred five thousand, one hundred thirty-two".