628433 has 4 divisors (see below), whose sum is σ = 676788. Its totient is φ = 580080.

The previous prime is 628427. The next prime is 628447. The reversal of 628433 is 334826.

628433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 334826 = 2 ⋅167413.

It can be written as a sum of positive squares in 2 ways, for example, as 305809 + 322624 = 553^2 + 568^2 .

It is a cyclic number.

It is not a de Polignac number, because 628433 - 2¹⁴ = 612049 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (628423) 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, 24158 + ... + 24183.

It is an arithmetic number, because the mean of its divisors is an integer number (169197).

2⁶²⁸⁴³³ is an apocalyptic number.

It is an amenable number.

628433 is a deficient number, since it is larger than the sum of its proper divisors (48355).

628433 is a wasteful number, since it uses less digits than its factorization.

628433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48354.

The product of its digits is 3456, while the sum is 26.

The square root of 628433 is about 792.7376615249. The cubic root of 628433 is about 85.6550541842.

The spelling of 628433 in words is "six hundred twenty-eight thousand, four hundred thirty-three".