28719396 has 36 divisors (see below), whose sum is σ = 75102300. Its totient is φ = 9242688.

The previous prime is 28719389. The next prime is 28719407. The reversal of 28719396 is 69391782.

It can be written as a sum of positive squares in 2 ways, for example, as 7096896 + 21622500 = 2664^2 + 4650^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12711 + ... + 14798.

It is an arithmetic number, because the mean of its divisors is an integer number (2086175).

Almost surely, 2^28719396 is an apocalyptic number.

It is an amenable number.

28719396 is an abundant number, since it is smaller than the sum of its proper divisors (46382904).

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

28719396 is a wasteful number, since it uses less digits than its factorization.

28719396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27548 (or 27543 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 28719396 is about 5359.0480497939. The cubic root of 28719396 is about 306.2375446274.

It can be divided in two parts, 287 and 19396, that added together give a 9-th power (19683 = 3⁹).

The spelling of 28719396 in words is "twenty-eight million, seven hundred nineteen thousand, three hundred ninety-six".