628417726 has 8 divisors (see below), whose sum is σ = 955539504. Its totient is φ = 309904560.

The previous prime is 628417721. The next prime is 628417807. The reversal of 628417726 is 627714826.

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

It is a super-2 number, since 2×628417726² = 789817676702022152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628417721) 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 3 ways as a sum of consecutive naturals, for example, 2151970 + ... + 2152261.

It is an arithmetic number, because the mean of its divisors is an integer number (119442438).

Almost surely, 2^628417726 is an apocalyptic number.

628417726 is a deficient number, since it is larger than the sum of its proper divisors (327121778).

628417726 is a wasteful number, since it uses less digits than its factorization.

628417726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4304306.

The product of its digits is 225792, while the sum is 43.

The square root of 628417726 is about 25068.2613278225. The cubic root of 628417726 is about 856.5436023281.

The spelling of 628417726 in words is "six hundred twenty-eight million, four hundred seventeen thousand, seven hundred twenty-six".