628776446 has 8 divisors (see below), whose sum is σ = 968655720. Its totient is φ = 305891208.

The previous prime is 628776431. The next prime is 628776469. The reversal of 628776446 is 644677826.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 628776394 and 628776403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4248416 + ... + 4248563.

It is an arithmetic number, because the mean of its divisors is an integer number (121081965).

Almost surely, 2^628776446 is an apocalyptic number.

628776446 is a deficient number, since it is larger than the sum of its proper divisors (339879274).

628776446 is a wasteful number, since it uses less digits than its factorization.

628776446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8497018.

The product of its digits is 2709504, while the sum is 50.

The square root of 628776446 is about 25075.4151710395. The cubic root of 628776446 is about 856.7065517286.

The spelling of 628776446 in words is "six hundred twenty-eight million, seven hundred seventy-six thousand, four hundred forty-six".