628816953 has 8 divisors (see below), whose sum is σ = 847066528. Its totient is φ = 414889344.

The previous prime is 628816943. The next prime is 628816973. The reversal of 628816953 is 359618826.

It is a happy number.

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

It is not a de Polignac number, because 628816953 - 2⁵ = 628816921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628816933) 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, 1080151 + ... + 1080732.

It is an arithmetic number, because the mean of its divisors is an integer number (105883316).

Almost surely, 2^628816953 is an apocalyptic number.

It is an amenable number.

628816953 is a deficient number, since it is larger than the sum of its proper divisors (218249575).

628816953 is a wasteful number, since it uses less digits than its factorization.

628816953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160983.

The product of its digits is 622080, while the sum is 48.

The square root of 628816953 is about 25076.2228615077. Note that the first 3 decimals coincide. The cubic root of 628816953 is about 856.7249482336.

The spelling of 628816953 in words is "six hundred twenty-eight million, eight hundred sixteen thousand, nine hundred fifty-three".