28527978 has 8 divisors (see below), whose sum is σ = 57055968. Its totient is φ = 9509324.

The previous prime is 28527959. The next prime is 28528007. The reversal of 28527978 is 87972582.

It is a sphenic number, since it is the product of 3 distinct primes.

28527978 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2377326 + ... + 2377337.

It is an arithmetic number, because the mean of its divisors is an integer number (7131996).

Almost surely, 2^28527978 is an apocalyptic number.

28527978 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.

28527978 is a wasteful number, since it uses less digits than its factorization.

28527978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754668.

The product of its digits is 564480, while the sum is 48.

The square root of 28527978 is about 5341.1588630184. The cubic root of 28527978 is about 305.5556582161. Note that the first 3 decimals are identical.

The spelling of 28527978 in words is "twenty-eight million, five hundred twenty-seven thousand, nine hundred seventy-eight".