28448986 has 8 divisors (see below), whose sum is σ = 42697044. Its totient is φ = 14216640.

The previous prime is 28448977. The next prime is 28448989. The reversal of 28448986 is 68984482.

It can be written as a sum of positive squares in 2 ways, for example, as 27510025 + 938961 = 5245^2 + 969^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28448989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3156 + ... + 8176.

Almost surely, 2^28448986 is an apocalyptic number.

28448986 is a deficient number, since it is larger than the sum of its proper divisors (14248058).

28448986 is a wasteful number, since it uses less digits than its factorization.

28448986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7856.

The product of its digits is 884736, while the sum is 49.

The square root of 28448986 is about 5333.7590871729. The cubic root of 28448986 is about 305.2733766809.

The spelling of 28448986 in words is "twenty-eight million, four hundred forty-eight thousand, nine hundred eighty-six".