20860628 has 12 divisors (see below), whose sum is σ = 37765140. Its totient is φ = 10070592.

The previous prime is 20860627. The next prime is 20860643. The reversal of 20860628 is 82606802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12264004 + 8596624 = 3502^2 + 2932^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20860594 and 20860603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20860627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89801 + ... + 90032.

It is an arithmetic number, because the mean of its divisors is an integer number (3147095).

Almost surely, 2^20860628 is an apocalyptic number.

It is an amenable number.

20860628 is a deficient number, since it is larger than the sum of its proper divisors (16904512).

20860628 is a wasteful number, since it uses less digits than its factorization.

20860628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179866 (or 179864 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 20860628 is about 4567.3436481176. The cubic root of 20860628 is about 275.2807183057.

The spelling of 20860628 in words is "twenty million, eight hundred sixty thousand, six hundred twenty-eight".