2172628 has 6 divisors (see below), whose sum is σ = 3802106. Its totient is φ = 1086312.

The previous prime is 2172619. The next prime is 2172641. The reversal of 2172628 is 8262712.

It can be written as a sum of positive squares in only one way, i.e., 2022084 + 150544 = 1422^2 + 388^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2172596 and 2172605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271575 + ... + 271582.

2^2172628 is an apocalyptic number.

It is an amenable number.

2172628 is a deficient number, since it is larger than the sum of its proper divisors (1629478).

2172628 is a wasteful number, since it uses less digits than its factorization.

2172628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543161 (or 543159 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 2172628 is about 1473.9837176848. The cubic root of 2172628 is about 129.5175013491.

The spelling of 2172628 in words is "two million, one hundred seventy-two thousand, six hundred twenty-eight".