628941779 has 8 divisors (see below), whose sum is σ = 648204480. Its totient is φ = 609889896.

The previous prime is 628941749. The next prime is 628941791. The reversal of 628941779 is 977149826.

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

It is a cyclic number.

It is not a de Polignac number, because 628941779 - 2¹⁶ = 628876243 is a prime.

It is a super-2 number, since 2×628941779² = 791135522743369682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 628941779.

It is not an unprimeable number, because it can be changed into a prime (628941749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46637 + ... + 58590.

It is an arithmetic number, because the mean of its divisors is an integer number (81025560).

Almost surely, 2^628941779 is an apocalyptic number.

628941779 is a deficient number, since it is larger than the sum of its proper divisors (19262701).

628941779 is a wasteful number, since it uses less digits than its factorization.

628941779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105409.

The product of its digits is 1524096, while the sum is 53.

The square root of 628941779 is about 25078.7116694618. The cubic root of 628941779 is about 856.7816337669.

The spelling of 628941779 in words is "six hundred twenty-eight million, nine hundred forty-one thousand, seven hundred seventy-nine".