305978712 has 64 divisors (see below), whose sum is σ = 842983680. Its totient is φ = 91953792.

The previous prime is 305978663. The next prime is 305978723. The reversal of 305978712 is 217879503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2013 + ... + 24819.

It is an arithmetic number, because the mean of its divisors is an integer number (13171620).

Almost surely, 2^305978712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305978712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421491840).

305978712 is an abundant number, since it is smaller than the sum of its proper divisors (537004968).

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

305978712 is a wasteful number, since it uses less digits than its factorization.

305978712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22872 (or 22868 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 305978712 is about 17492.2471969727. The cubic root of 305978712 is about 673.8507830644.

The spelling of 305978712 in words is "three hundred five million, nine hundred seventy-eight thousand, seven hundred twelve".