628060991 has 8 divisors (see below), whose sum is σ = 631701504. Its totient is φ = 624428280.

The previous prime is 628060957. The next prime is 628061009. The reversal of 628060991 is 199060826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628060991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628060921) 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, 241106 + ... + 243696.

It is an arithmetic number, because the mean of its divisors is an integer number (78962688).

Almost surely, 2^628060991 is an apocalyptic number.

628060991 is a deficient number, since it is larger than the sum of its proper divisors (3640513).

628060991 is a wasteful number, since it uses less digits than its factorization.

628060991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 628060991 is about 25061.1450456678. The cubic root of 628060991 is about 856.3814931096.

The spelling of 628060991 in words is "six hundred twenty-eight million, sixty thousand, nine hundred ninety-one".