771628 has 48 divisors (see below), whose sum is σ = 1693440. Its totient is φ = 302400.

The previous prime is 771623. The next prime is 771629. The reversal of 771628 is 826177.

It is a happy number.

771628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 771628.

It is not an unprimeable number, because it can be changed into a prime (771623) by changing a digit.

771628 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10833 + ... + 10903.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2⁷⁷¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

771628 is an abundant number, since it is smaller than the sum of its proper divisors (921812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

771628 is a wasteful number, since it uses less digits than its factorization.

771628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 116 counting only the distinct ones).

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

The square root of 771628 is about 878.4235880257. The cubic root of 771628 is about 91.7211151269.

It can be divided in two parts, 7716 and 28, that added together give a square (7744 = 88²).

The spelling of 771628 in words is "seven hundred seventy-one thousand, six hundred twenty-eight".