428571432 has 96 divisors (see below), whose sum is σ = 1208692800. Its totient is φ = 140698944.

The previous prime is 428571431. The next prime is 428571433. The reversal of 428571432 is 234175824.

It is a happy number.

428571432 is a `hidden beast` number, since 42 + 8 + 571 + 43 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (428571431) and next prime (428571433).

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 (428571431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2566213 + ... + 2566379.

It is an arithmetic number, because the mean of its divisors is an integer number (12590550).

Almost surely, 2^428571432 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 428571432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604346400).

428571432 is an abundant number, since it is smaller than the sum of its proper divisors (780121368).

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

428571432 is a wasteful number, since it uses less digits than its factorization.

428571432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 281 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 428571432 is about 20701.9668630785. The cubic root of 428571432 is about 753.9474431397.

The spelling of 428571432 in words is "four hundred twenty-eight million, five hundred seventy-one thousand, four hundred thirty-two".