28999998 has 16 divisors (see below), whose sum is σ = 64444560. Its totient is φ = 9666648.

The previous prime is 28999991. The next prime is 29000039. The reversal of 28999998 is 89999982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28999991) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 268465 + ... + 268572.

It is an arithmetic number, because the mean of its divisors is an integer number (4027785).

Almost surely, 2^28999998 is an apocalyptic number.

28999998 is an abundant number, since it is smaller than the sum of its proper divisors (35444562).

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

28999998 is a wasteful number, since it uses less digits than its factorization.

28999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537048 (or 537042 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 63.

The square root of 28999998 is about 5385.1646214392. The cubic root of 28999998 is about 307.2316755058.

It can be divided in two parts, 2 and 8999998, that added together give a square (9000000 = 3000²).

The spelling of 28999998 in words is "twenty-eight million, nine hundred ninety-nine thousand, nine hundred ninety-eight".