628403943 has 8 divisors (see below), whose sum is σ = 842259456. Its totient is φ = 416742200.

The previous prime is 628403939. The next prime is 628403969. The reversal of 628403943 is 349304826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628403943 - 2² = 628403939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628403903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547773 + ... + 548918.

It is an arithmetic number, because the mean of its divisors is an integer number (105282432).

Almost surely, 2^628403943 is an apocalyptic number.

628403943 is a deficient number, since it is larger than the sum of its proper divisors (213855513).

628403943 is a wasteful number, since it uses less digits than its factorization.

628403943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096885.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 628403943 is about 25067.9864169422. The cubic root of 628403943 is about 856.5373401311.

The spelling of 628403943 in words is "six hundred twenty-eight million, four hundred three thousand, nine hundred forty-three".