628998039 has 24 divisors (see below), whose sum is σ = 952985280. Its totient is φ = 399307968.

The previous prime is 628997989. The next prime is 628998047. The reversal of 628998039 is 930899826.

628998039 is a `hidden beast` number, since 628 + 9 + 9 + 8 + 0 + 3 + 9 = 666.

It is not a de Polignac number, because 628998039 - 2⁷ = 628997911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628991039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4444 + ... + 35745.

It is an arithmetic number, because the mean of its divisors is an integer number (39707720).

Almost surely, 2^628998039 is an apocalyptic number.

628998039 is a deficient number, since it is larger than the sum of its proper divisors (323987241).

628998039 is a wasteful number, since it uses less digits than its factorization.

628998039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40279 (or 40276 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 628998039 is about 25079.8333128432. The cubic root of 628998039 is about 856.8071799033.

The spelling of 628998039 in words is "six hundred twenty-eight million, nine hundred ninety-eight thousand, thirty-nine".