628461679 has 4 divisors (see below), whose sum is σ = 628528600. Its totient is φ = 628394760.

The previous prime is 628461649. The next prime is 628461707. The reversal of 628461679 is 976164826.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 628461679 - 2⁷ = 628461551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628461619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16512 + ... + 39109.

It is an arithmetic number, because the mean of its divisors is an integer number (157132150).

Almost surely, 2^628461679 is an apocalyptic number.

628461679 is a deficient number, since it is larger than the sum of its proper divisors (66921).

628461679 is a wasteful number, since it uses less digits than its factorization.

628461679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66920.

The product of its digits is 870912, while the sum is 49.

The square root of 628461679 is about 25069.1379787978. The cubic root of 628461679 is about 856.5635714143.

The spelling of 628461679 in words is "six hundred twenty-eight million, four hundred sixty-one thousand, six hundred seventy-nine".