305142040 has 32 divisors (see below), whose sum is σ = 784651680. Its totient is φ = 104620032.

The previous prime is 305142029. The next prime is 305142067. The reversal of 305142040 is 40241503.

It is a super-2 number, since 2×305142040² = 186223329150723200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 305141999 and 305142017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544617 + ... + 545176.

It is an arithmetic number, because the mean of its divisors is an integer number (24520365).

Almost surely, 2^305142040 is an apocalyptic number.

It is an amenable number.

305142040 is an abundant number, since it is smaller than the sum of its proper divisors (479509640).

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

305142040 is a wasteful number, since it uses less digits than its factorization.

305142040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089811 (or 1089807 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 305142040 is about 17468.3153165954. The cubic root of 305142040 is about 673.2360270674.

Adding to 305142040 its reverse (40241503), we get a palindrome (345383543).

The spelling of 305142040 in words is "three hundred five million, one hundred forty-two thousand, forty".