628666474 has 8 divisors (see below), whose sum is σ = 952155360. Its totient is φ = 311281356.

The previous prime is 628666469. The next prime is 628666481. The reversal of 628666474 is 474666826.

It is a happy number.

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

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, 1525684 + ... + 1526095.

It is an arithmetic number, because the mean of its divisors is an integer number (119019420).

Almost surely, 2^628666474 is an apocalyptic number.

628666474 is a deficient number, since it is larger than the sum of its proper divisors (323488886).

628666474 is a wasteful number, since it uses less digits than its factorization.

628666474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051884.

The product of its digits is 2322432, while the sum is 49.

The square root of 628666474 is about 25073.2222500420. Note that the first 4 decimals coincide. The cubic root of 628666474 is about 856.6566032789.

The spelling of 628666474 in words is "six hundred twenty-eight million, six hundred sixty-six thousand, four hundred seventy-four".