628665653 has 16 divisors (see below), whose sum is σ = 784650240. Its totient is φ = 489332400.

The previous prime is 628665637. The next prime is 628665689. The reversal of 628665653 is 356566826.

It is a cyclic number.

It is not a de Polignac number, because 628665653 - 2⁴ = 628665637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628665598 and 628665607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628665353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75428 + ... + 83346.

It is an arithmetic number, because the mean of its divisors is an integer number (49040640).

Almost surely, 2^628665653 is an apocalyptic number.

It is an amenable number.

628665653 is a deficient number, since it is larger than the sum of its proper divisors (155984587).

628665653 is a wasteful number, since it uses less digits than its factorization.

628665653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8968.

The product of its digits is 1555200, while the sum is 47.

The square root of 628665653 is about 25073.2058779886. The cubic root of 628665653 is about 856.6562303650.

The spelling of 628665653 in words is "six hundred twenty-eight million, six hundred sixty-five thousand, six hundred fifty-three".