28776996 has 18 divisors (see below), whose sum is σ = 72741942. Its totient is φ = 9592320.

The previous prime is 28776977. The next prime is 28776997. The reversal of 28776996 is 69967782.

It can be written as a sum of positive squares in only one way, i.e., 25644096 + 3132900 = 5064^2 + 1770^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (28776997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399645 + ... + 399716.

It is an arithmetic number, because the mean of its divisors is an integer number (4041219).

Almost surely, 2^28776996 is an apocalyptic number.

It is an amenable number.

28776996 is an abundant number, since it is smaller than the sum of its proper divisors (43964946).

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

28776996 is a wasteful number, since it uses less digits than its factorization.

28776996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799371 (or 799366 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 28776996 is about 5364.4194466876. The cubic root of 28776996 is about 306.4421392640.

The spelling of 28776996 in words is "twenty-eight million, seven hundred seventy-six thousand, nine hundred ninety-six".