20120928 has 48 divisors (see below), whose sum is σ = 55928880. Its totient is φ = 6311936.

The previous prime is 20120927. The next prime is 20120939. The reversal of 20120928 is 82902102.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20120898 and 20120907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4533 + ... + 7796.

It is an arithmetic number, because the mean of its divisors is an integer number (1165185).

Almost surely, 2^20120928 is an apocalyptic number.

It is an amenable number.

20120928 is an abundant number, since it is smaller than the sum of its proper divisors (35807952).

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

20120928 is a wasteful number, since it uses less digits than its factorization.

20120928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12359 (or 12351 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20120928 is about 4485.6357408956. The cubic root of 20120928 is about 271.9877445459.

The spelling of 20120928 in words is "twenty million, one hundred twenty thousand, nine hundred twenty-eight".