305972440 has 16 divisors (see below), whose sum is σ = 688438080. Its totient is φ = 122388960.

The previous prime is 305972437. The next prime is 305972461. The reversal of 305972440 is 44279503.

It is a junction number, because it is equal to n+sod(n) for n = 305972396 and 305972405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3824616 + ... + 3824695.

It is an arithmetic number, because the mean of its divisors is an integer number (43027380).

Almost surely, 2^305972440 is an apocalyptic number.

It is an amenable number.

305972440 is an abundant number, since it is smaller than the sum of its proper divisors (382465640).

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

305972440 is a wasteful number, since it uses less digits than its factorization.

305972440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7649322 (or 7649318 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 305972440 is about 17492.0679166301. The cubic root of 305972440 is about 673.8461787997.

The spelling of 305972440 in words is "three hundred five million, nine hundred seventy-two thousand, four hundred forty".