628666470 has 24 divisors (see below), whose sum is σ = 1634533056. Its totient is φ = 167644368.

The previous prime is 628666469. The next prime is 628666481. The reversal of 628666470 is 74666826.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3492502 + ... + 3492681.

It is an arithmetic number, because the mean of its divisors is an integer number (68105544).

Almost surely, 2^628666470 is an apocalyptic number.

628666470 is an abundant number, since it is smaller than the sum of its proper divisors (1005866586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628666470 is a wasteful number, since it uses less digits than its factorization.

628666470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985196 (or 6985193 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 628666470 is about 25073.2221702756. Note that the first 3 decimals coincide. The cubic root of 628666470 is about 856.6566014620.

The spelling of 628666470 in words is "six hundred twenty-eight million, six hundred sixty-six thousand, four hundred seventy".