428931 has 6 divisors (see below), whose sum is σ = 619580. Its totient is φ = 285948.

The previous prime is 428899. The next prime is 428951. The reversal of 428931 is 139824.

It is not a de Polignac number, because 428931 - 2⁵ = 428899 is a prime.

It is a super-2 number, since 2×428931² = 367963605522, 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 = 428895 and 428904.

It is not an unprimeable number, because it can be changed into a prime (428951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23821 + ... + 23838.

2⁴²⁸⁹³¹ is an apocalyptic number.

428931 is a deficient number, since it is larger than the sum of its proper divisors (190649).

428931 is a wasteful number, since it uses less digits than its factorization.

428931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47665 (or 47662 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 428931 is about 654.9282403439. The cubic root of 428931 is about 75.4158236156.

The spelling of 428931 in words is "four hundred twenty-eight thousand, nine hundred thirty-one".