28551996 has 36 divisors (see below), whose sum is σ = 78735384. Its totient is φ = 8652000.

The previous prime is 28551973. The next prime is 28551997. The reversal of 28551996 is 69915582.

28551996 is a `hidden beast` number, since 2 + 8 + 551 + 9 + 96 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35655 + ... + 36446.

It is an arithmetic number, because the mean of its divisors is an integer number (2187094).

Almost surely, 2^28551996 is an apocalyptic number.

It is an amenable number.

28551996 is an abundant number, since it is smaller than the sum of its proper divisors (50183388).

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

28551996 is a wasteful number, since it uses less digits than its factorization.

28551996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72122 (or 72117 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 28551996 is about 5343.4067784514. The cubic root of 28551996 is about 305.6413843199.

It can be divided in two parts, 2855 and 1996, that added together give a triangular number (4851 = T₉₈).

The spelling of 28551996 in words is "twenty-eight million, five hundred fifty-one thousand, nine hundred ninety-six".