28440098 has 12 divisors (see below), whose sum is σ = 44597238. Its totient is φ = 13601280.

The previous prime is 28440053. The next prime is 28440103. The reversal of 28440098 is 89004482.

It can be written as a sum of positive squares in only one way, i.e., 20948929 + 7491169 = 4577^2 + 2737^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12383 + ... + 14498.

Almost surely, 2^28440098 is an apocalyptic number.

28440098 is a deficient number, since it is larger than the sum of its proper divisors (16157140).

28440098 is a wasteful number, since it uses less digits than its factorization.

28440098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26929 (or 26906 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28440098 is about 5332.9258385993. The cubic root of 28440098 is about 305.2415823154.

The spelling of 28440098 in words is "twenty-eight million, four hundred forty thousand, ninety-eight".