428549943 has 8 divisors (see below), whose sum is σ = 575899648. Its totient is φ = 283450104.

The previous prime is 428549881. The next prime is 428549951. The reversal of 428549943 is 349945824.

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

It is not a de Polignac number, because 428549943 - 2⁸ = 428549687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428549892 and 428549901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428549993) 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, 562021 + ... + 562782.

It is an arithmetic number, because the mean of its divisors is an integer number (71987456).

Almost surely, 2^428549943 is an apocalyptic number.

428549943 is a deficient number, since it is larger than the sum of its proper divisors (147349705).

428549943 is a wasteful number, since it uses less digits than its factorization.

428549943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124933.

The product of its digits is 1244160, while the sum is 48.

The square root of 428549943 is about 20701.4478479163. The cubic root of 428549943 is about 753.9348417029.

The spelling of 428549943 in words is "four hundred twenty-eight million, five hundred forty-nine thousand, nine hundred forty-three".