28148898 has 16 divisors (see below), whose sum is σ = 56389536. Its totient is φ = 9367680.

The previous prime is 28148881. The next prime is 28148903. The reversal of 28148898 is 89884182.

It is a super-2 number, since 2×28148898² = 1584720917228808, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 553 + ... + 7523.

It is an arithmetic number, because the mean of its divisors is an integer number (3524346).

Almost surely, 2^28148898 is an apocalyptic number.

28148898 is an abundant number, since it is smaller than the sum of its proper divisors (28240638).

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

28148898 is a wasteful number, since it uses less digits than its factorization.

28148898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7649.

The product of its digits is 294912, while the sum is 48.

The square root of 28148898 is about 5305.5535055261. The cubic root of 28148898 is about 304.1962101868.

The spelling of 28148898 in words is "twenty-eight million, one hundred forty-eight thousand, eight hundred ninety-eight".