628947963 has 32 divisors (see below), whose sum is σ = 1127531520. Its totient is φ = 338256000.

The previous prime is 628947947. The next prime is 628947967. The reversal of 628947963 is 369749826.

It is a happy number.

628947963 is a `hidden beast` number, since 628 + 9 + 4 + 7 + 9 + 6 + 3 = 666.

It is not a de Polignac number, because 628947963 - 2⁴ = 628947947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628947967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94663 + ... + 101088.

It is an arithmetic number, because the mean of its divisors is an integer number (35235360).

Almost surely, 2^628947963 is an apocalyptic number.

628947963 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

628947963 is a deficient number, since it is larger than the sum of its proper divisors (498583557).

628947963 is a wasteful number, since it uses less digits than its factorization.

628947963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195784 (or 195778 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 628947963 is about 25078.8349609786. The cubic root of 628947963 is about 856.7844418277.

The spelling of 628947963 in words is "six hundred twenty-eight million, nine hundred forty-seven thousand, nine hundred sixty-three".