628884841 has 8 divisors (see below), whose sum is σ = 677605320. Its totient is φ = 580213632.

The previous prime is 628884833. The next prime is 628884877. The reversal of 628884841 is 148488826.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3884841 + 625000000 = 1971^2 + 25000^2 .

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 628884841 - 2³ = 628884833 is a prime.

It is a super-2 number, since 2×628884841² = 790992286479190562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628884541) 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, 16755 + ... + 39223.

It is an arithmetic number, because the mean of its divisors is an integer number (84700665).

Almost surely, 2^628884841 is an apocalyptic number.

It is an amenable number.

628884841 is a deficient number, since it is larger than the sum of its proper divisors (48720479).

628884841 is a wasteful number, since it uses less digits than its factorization.

628884841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24635.

The product of its digits is 786432, while the sum is 49.

The square root of 628884841 is about 25077.5764578637. The cubic root of 628884841 is about 856.7557782179.

The spelling of 628884841 in words is "six hundred twenty-eight million, eight hundred eighty-four thousand, eight hundred forty-one".