628411645 has 16 divisors (see below), whose sum is σ = 769376880. Its totient is φ = 492642304.

The previous prime is 628411639. The next prime is 628411657. The reversal of 628411645 is 546114826.

It can be written as a sum of positive squares in 8 ways, for example, as 169338169 + 459073476 = 13013^2 + 21426^2 .

It is a cyclic number.

It is not a de Polignac number, because 628411645 - 2¹¹ = 628409597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44037 + ... + 56533.

It is an arithmetic number, because the mean of its divisors is an integer number (48086055).

Almost surely, 2^628411645 is an apocalyptic number.

It is an amenable number.

628411645 is a deficient number, since it is larger than the sum of its proper divisors (140965235).

628411645 is a wasteful number, since it uses less digits than its factorization.

628411645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12704.

The product of its digits is 46080, while the sum is 37.

The square root of 628411645 is about 25068.1400387025. The cubic root of 628411645 is about 856.5408394851.

The spelling of 628411645 in words is "six hundred twenty-eight million, four hundred eleven thousand, six hundred forty-five".