628042243 has 4 divisors (see below), whose sum is σ = 628324488. Its totient is φ = 627760000.

The previous prime is 628042231. The next prime is 628042249. The reversal of 628042243 is 342240826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342240826 = 2 ⋅171120413.

It is a cyclic number.

It is not a de Polignac number, because 628042243 - 2¹³ = 628034051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628042249) 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, 137758 + ... + 142243.

It is an arithmetic number, because the mean of its divisors is an integer number (157081122).

Almost surely, 2^628042243 is an apocalyptic number.

628042243 is a deficient number, since it is larger than the sum of its proper divisors (282245).

628042243 is a wasteful number, since it uses less digits than its factorization.

628042243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282244.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 628042243 is about 25060.7709977167. The cubic root of 628042243 is about 856.3729718565.

The spelling of 628042243 in words is "six hundred twenty-eight million, forty-two thousand, two hundred forty-three".