28442898 has 24 divisors (see below), whose sum is σ = 67229136. Its totient is φ = 8619000.

The previous prime is 28442893. The next prime is 28442929. The reversal of 28442898 is 89824482.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28442893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71628 + ... + 72023.

It is an arithmetic number, because the mean of its divisors is an integer number (2801214).

Almost surely, 2^28442898 is an apocalyptic number.

28442898 is an abundant number, since it is smaller than the sum of its proper divisors (38786238).

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

28442898 is a wasteful number, since it uses less digits than its factorization.

28442898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143670 (or 143667 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 28442898 is about 5333.1883521961. The cubic root of 28442898 is about 305.2515992567.

The spelling of 28442898 in words is "twenty-eight million, four hundred forty-two thousand, eight hundred ninety-eight".