28991796 has 24 divisors (see below), whose sum is σ = 71208480. Its totient is φ = 9155232.

The previous prime is 28991791. The next prime is 28991801. The reversal of 28991796 is 69719982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28991791) and next prime (28991801).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28991791) 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, 63351 + ... + 63806.

It is an arithmetic number, because the mean of its divisors is an integer number (2967020).

Almost surely, 2^28991796 is an apocalyptic number.

It is an amenable number.

28991796 is an abundant number, since it is smaller than the sum of its proper divisors (42216684).

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

28991796 is a wasteful number, since it uses less digits than its factorization.

28991796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127183 (or 127181 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 28991796 is about 5384.4030309775. The cubic root of 28991796 is about 307.2027082416.

The spelling of 28991796 in words is "twenty-eight million, nine hundred ninety-one thousand, seven hundred ninety-six".