428377 has 4 divisors (see below), whose sum is σ = 432640. Its totient is φ = 424116.

The previous prime is 428369. The next prime is 428401. The reversal of 428377 is 773824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428377 - 2³ = 428369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428177) 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, 1977 + ... + 2182.

It is an arithmetic number, because the mean of its divisors is an integer number (108160).

2⁴²⁸³⁷⁷ is an apocalyptic number.

It is an amenable number.

428377 is a deficient number, since it is larger than the sum of its proper divisors (4263).

428377 is a wasteful number, since it uses less digits than its factorization.

428377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262.

The product of its digits is 9408, while the sum is 31.

The square root of 428377 is about 654.5051565878. The cubic root of 428377 is about 75.3833410276.

The spelling of 428377 in words is "four hundred twenty-eight thousand, three hundred seventy-seven".