28469988 has 24 divisors (see below), whose sum is σ = 73811360. Its totient is φ = 9489960.

The previous prime is 28469953. The next prime is 28469989. The reversal of 28469988 is 88996482.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28469989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131698 + ... + 131913.

Almost surely, 2^28469988 is an apocalyptic number.

It is an amenable number.

28469988 is an abundant number, since it is smaller than the sum of its proper divisors (45341372).

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

28469988 is a wasteful number, since it uses less digits than its factorization.

28469988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263624 (or 263616 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 28469988 is about 5335.7275042866. The cubic root of 28469988 is about 305.3484792336.

The spelling of 28469988 in words is "twenty-eight million, four hundred sixty-nine thousand, nine hundred eighty-eight".