28578988 has 12 divisors (see below), whose sum is σ = 50833552. Its totient is φ = 14055120.

The previous prime is 28578973. The next prime is 28579003. The reversal of 28578988 is 88987582.

It is an interprime number because it is at equal distance from previous prime (28578973) and next prime (28579003).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58320 + ... + 58807.

Almost surely, 2^28578988 is an apocalyptic number.

It is an amenable number.

28578988 is a deficient number, since it is larger than the sum of its proper divisors (22254564).

28578988 is a wasteful number, since it uses less digits than its factorization.

28578988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117192 (or 117190 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 55.

The square root of 28578988 is about 5345.9319112761. The cubic root of 28578988 is about 305.7376680018.

The spelling of 28578988 in words is "twenty-eight million, five hundred seventy-eight thousand, nine hundred eighty-eight".