628471340 has 24 divisors (see below), whose sum is σ = 1508331552. Its totient is φ = 215475840.

The previous prime is 628471331. The next prime is 628471369. The reversal of 628471340 is 43174826.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 628471340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244401 + ... + 2244680.

It is an arithmetic number, because the mean of its divisors is an integer number (62847148).

Almost surely, 2^628471340 is an apocalyptic number.

It is an amenable number.

628471340 is an abundant number, since it is smaller than the sum of its proper divisors (879860212).

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

628471340 is a wasteful number, since it uses less digits than its factorization.

628471340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489097 (or 4489095 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 628471340 is about 25069.3306651773. The cubic root of 628471340 is about 856.5679605540.

The spelling of 628471340 in words is "six hundred twenty-eight million, four hundred seventy-one thousand, three hundred forty".