20860128 has 36 divisors (see below), whose sum is σ = 59321808. Its totient is φ = 6953280.

The previous prime is 20860097. The next prime is 20860163. The reversal of 20860128 is 82106802.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35928 + ... + 36503.

It is an arithmetic number, because the mean of its divisors is an integer number (1647828).

Almost surely, 2^20860128 is an apocalyptic number.

It is an amenable number.

20860128 is an abundant number, since it is smaller than the sum of its proper divisors (38461680).

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

20860128 is a wasteful number, since it uses less digits than its factorization.

20860128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72447 (or 72436 counting only the distinct ones).

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

The square root of 20860128 is about 4567.2889113784. The cubic root of 20860128 is about 275.2785189238.

The spelling of 20860128 in words is "twenty million, eight hundred sixty thousand, one hundred twenty-eight".