8021628 has 18 divisors (see below), whose sum is σ = 20276984. Its totient is φ = 2673864.

The previous prime is 8021627. The next prime is 8021639. The reversal of 8021628 is 8261208.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111376 + ... + 111447.

Almost surely, 2^8021628 is an apocalyptic number.

It is an amenable number.

8021628 is an abundant number, since it is smaller than the sum of its proper divisors (12255356).

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

8021628 is a wasteful number, since it uses less digits than its factorization.

8021628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222833 (or 222828 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 8021628 is about 2832.2478705085. The cubic root of 8021628 is about 200.1800711566.

It can be divided in two parts, 8021 and 628, that added together give a square (8649 = 93²).

The spelling of 8021628 in words is "eight million, twenty-one thousand, six hundred twenty-eight".