628951393 has 4 divisors (see below), whose sum is σ = 718801600. Its totient is φ = 539101188.

The previous prime is 628951381. The next prime is 628951403. The reversal of 628951393 is 393159826.

It is a happy number.

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 628951393 - 2¹³ = 628943201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628951303) 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, 44925093 + ... + 44925106.

It is an arithmetic number, because the mean of its divisors is an integer number (179700400).

Almost surely, 2^628951393 is an apocalyptic number.

It is an amenable number.

628951393 is a deficient number, since it is larger than the sum of its proper divisors (89850207).

628951393 is an equidigital number, since it uses as much as digits as its factorization.

628951393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89850206.

The product of its digits is 349920, while the sum is 46.

The square root of 628951393 is about 25078.9033452422. The cubic root of 628951393 is about 856.7859993308.

The spelling of 628951393 in words is "six hundred twenty-eight million, nine hundred fifty-one thousand, three hundred ninety-three".