305720412 has 24 divisors (see below), whose sum is σ = 750892800. Its totient is φ = 96543216.

The previous prime is 305720399. The next prime is 305720447. The reversal of 305720412 is 214027503.

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, 670212 + ... + 670667.

It is an arithmetic number, because the mean of its divisors is an integer number (31287200).

Almost surely, 2^305720412 is an apocalyptic number.

It is an amenable number.

305720412 is an abundant number, since it is smaller than the sum of its proper divisors (445172388).

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

305720412 is a wasteful number, since it uses less digits than its factorization.

305720412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340905 (or 1340903 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 305720412 is about 17484.8623672021. The cubic root of 305720412 is about 673.6611133790.

Adding to 305720412 its reverse (214027503), we get a palindrome (519747915).

The spelling of 305720412 in words is "three hundred five million, seven hundred twenty thousand, four hundred twelve".