628666492 has 6 divisors (see below), whose sum is σ = 1100166368. Its totient is φ = 314333244.

The previous prime is 628666487. The next prime is 628666499. The reversal of 628666492 is 294666826.

It is a happy number.

628666492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628666499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78583308 + ... + 78583315.

Almost surely, 2^628666492 is an apocalyptic number.

It is an amenable number.

628666492 is a deficient number, since it is larger than the sum of its proper divisors (471499876).

628666492 is a wasteful number, since it uses less digits than its factorization.

628666492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157166627 (or 157166625 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 49.

The square root of 628666492 is about 25073.2226089907. Note that the first 3 decimals coincide. The cubic root of 628666492 is about 856.6566114549.

The spelling of 628666492 in words is "six hundred twenty-eight million, six hundred sixty-six thousand, four hundred ninety-two".