628771 has 8 divisors (see below), whose sum is σ = 738864. Its totient is φ = 527520.

The previous prime is 628759. The next prime is 628781. The reversal of 628771 is 177826.

628771 = T₂₂₈ + T₂₂₉ + ... + T₂₄₉.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 628771 - 2¹¹ = 626723 is a prime.

It is a Duffinian number.

628771 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (628721) 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, 2056 + ... + 2341.

It is an arithmetic number, because the mean of its divisors is an integer number (92358).

2⁶²⁸⁷⁷¹ is an apocalyptic number.

628771 is a deficient number, since it is larger than the sum of its proper divisors (110093).

628771 is a wasteful number, since it uses less digits than its factorization.

628771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421.

The product of its digits is 4704, while the sum is 31.

The square root of 628771 is about 792.9508181470. The cubic root of 628771 is about 85.6704078334.

The spelling of 628771 in words is "six hundred twenty-eight thousand, seven hundred seventy-one".