428747143 has 8 divisors (see below), whose sum is σ = 482812416. Its totient is φ = 377196600.

The previous prime is 428747131. The next prime is 428747153. The reversal of 428747143 is 341747824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428747143 - 2¹³ = 428738951 is a prime.

It is a super-2 number, since 2×428747143² = 367648225261324898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428747096 and 428747105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428747153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628321 + ... + 629002.

It is an arithmetic number, because the mean of its divisors is an integer number (60351552).

Almost surely, 2^428747143 is an apocalyptic number.

428747143 is a deficient number, since it is larger than the sum of its proper divisors (54065273).

428747143 is a wasteful number, since it uses less digits than its factorization.

428747143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257365.

The product of its digits is 150528, while the sum is 40.

The square root of 428747143 is about 20706.2102519993. The cubic root of 428747143 is about 754.0504666177.

The spelling of 428747143 in words is "four hundred twenty-eight million, seven hundred forty-seven thousand, one hundred forty-three".