28739396 has 12 divisors (see below), whose sum is σ = 57478848. Its totient is φ = 12316872.

The previous prime is 28739393. The next prime is 28739411. The reversal of 28739396 is 69393782.

28739396 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28739396.

It is not an unprimeable number, because it can be changed into a prime (28739393) 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, 513176 + ... + 513231.

It is an arithmetic number, because the mean of its divisors is an integer number (4789904).

Almost surely, 2^28739396 is an apocalyptic number.

It is an amenable number.

28739396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28739396 is a wasteful number, since it uses less digits than its factorization.

28739396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026418 (or 1026416 counting only the distinct ones).

The product of its digits is 489888, while the sum is 47.

The square root of 28739396 is about 5360.9137280878. The cubic root of 28739396 is about 306.3086154083.

The spelling of 28739396 in words is "twenty-eight million, seven hundred thirty-nine thousand, three hundred ninety-six".