428307912 has 84 divisors (see below), whose sum is σ = 1208524635. Its totient is φ = 142242480.

The previous prime is 428307883. The next prime is 428307917. The reversal of 428307912 is 219703824.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 214153956 + 214153956 = 14634^2 + 14634^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14634.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (428307917) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 1580337 + ... + 1580607.

Almost surely, 2^428307912 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 428307912

428307912 is an abundant number, since it is smaller than the sum of its proper divisors (780216723).

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

428307912 is an frugal number, since it uses more digits than its factorization.

428307912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 428307912 is about 20695.6012717679. The cubic root of 428307912 is about 753.7928823899.

The spelling of 428307912 in words is "four hundred twenty-eight million, three hundred seven thousand, nine hundred twelve".