428959 has 4 divisors (see below), whose sum is σ = 430920. Its totient is φ = 427000.

The previous prime is 428957. The next prime is 428977. The reversal of 428959 is 959824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428959 - 2¹ = 428957 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 604 + ... + 1105.

It is an arithmetic number, because the mean of its divisors is an integer number (107730).

2⁴²⁸⁹⁵⁹ is an apocalyptic number.

428959 is a deficient number, since it is larger than the sum of its proper divisors (1961).

428959 is a wasteful number, since it uses less digits than its factorization.

428959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960.

The product of its digits is 25920, while the sum is 37.

The square root of 428959 is about 654.9496163828. The cubic root of 428959 is about 75.4174645921.

It can be divided in two parts, 42 and 8959, that multiplied together give a triangular number (376278 = T₈₆₇).

The spelling of 428959 in words is "four hundred twenty-eight thousand, nine hundred fifty-nine".