628461784 has 32 divisors (see below), whose sum is σ = 1283166000. Its totient is φ = 287425152.

The previous prime is 628461773. The next prime is 628461793. The reversal of 628461784 is 487164826.

It is a congruent number.

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, 66879 + ... + 75694.

Almost surely, 2^628461784 is an apocalyptic number.

It is an amenable number.

628461784 is an abundant number, since it is smaller than the sum of its proper divisors (654704216).

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

628461784 is a wasteful number, since it uses less digits than its factorization.

628461784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142627 (or 142623 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 628461784 is about 25069.1400730061. The cubic root of 628461784 is about 856.5636191176.

The spelling of 628461784 in words is "six hundred twenty-eight million, four hundred sixty-one thousand, seven hundred eighty-four".