628734279 has 8 divisors (see below), whose sum is σ = 874760832. Its totient is φ = 400931960.

The previous prime is 628734277. The next prime is 628734287. The reversal of 628734279 is 972437826.

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 628734279 - 2¹ = 628734277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628734277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4555977 + ... + 4556114.

It is an arithmetic number, because the mean of its divisors is an integer number (109345104).

Almost surely, 2^628734279 is an apocalyptic number.

628734279 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

628734279 is a deficient number, since it is larger than the sum of its proper divisors (246026553).

628734279 is a wasteful number, since it uses less digits than its factorization.

628734279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112117.

The product of its digits is 1016064, while the sum is 48.

The square root of 628734279 is about 25074.5743533165. The cubic root of 628734279 is about 856.6874004850.

The spelling of 628734279 in words is "six hundred twenty-eight million, seven hundred thirty-four thousand, two hundred seventy-nine".