628417946 has 8 divisors (see below), whose sum is σ = 1015136724. Its totient is φ = 290039040.

The previous prime is 628417931. The next prime is 628417949. The reversal of 628417946 is 649714826.

It can be written as a sum of positive squares in 2 ways, for example, as 591024721 + 37393225 = 24311^2 + 6115^2 .

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

It is a super-2 number, since 2×628417946² = 789818229709717832, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 628417946.

It is not an unprimeable number, because it can be changed into a prime (628417949) 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, 12084935 + ... + 12084986.

Almost surely, 2^628417946 is an apocalyptic number.

628417946 is a deficient number, since it is larger than the sum of its proper divisors (386718778).

628417946 is a wasteful number, since it uses less digits than its factorization.

628417946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24169936.

The product of its digits is 580608, while the sum is 47.

The square root of 628417946 is about 25068.2657158408. The cubic root of 628417946 is about 856.5437022826.

The spelling of 628417946 in words is "six hundred twenty-eight million, four hundred seventeen thousand, nine hundred forty-six".