2106621028 has 48 divisors (see below), whose sum is σ = 3999227904. Its totient is φ = 967162880.

The previous prime is 2106621017. The next prime is 2106621059. The reversal of 2106621028 is 8201266012.

It is a super-2 number, since 2×2106621028² = 8875704311223553568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2106620987 and 2106621005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1223208 + ... + 1224928.

It is an arithmetic number, because the mean of its divisors is an integer number (83317248).

Almost surely, 2^2106621028 is an apocalyptic number.

It is an amenable number.

2106621028 is a deficient number, since it is larger than the sum of its proper divisors (1892606876).

2106621028 is a wasteful number, since it uses less digits than its factorization.

2106621028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172 (or 2170 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2106621028 is about 45897.9414353193. The cubic root of 2106621028 is about 1281.9235864609.

The spelling of 2106621028 in words is "two billion, one hundred six million, six hundred twenty-one thousand, twenty-eight".