28691498 has 16 divisors (see below), whose sum is σ = 48569760. Its totient is φ = 12591600.

The previous prime is 28691483. The next prime is 28691543. The reversal of 28691498 is 89419682.

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 7 ways as a sum of consecutive naturals, for example, 21848 + ... + 23123.

It is an arithmetic number, because the mean of its divisors is an integer number (3035610).

Almost surely, 2^28691498 is an apocalyptic number.

28691498 is a deficient number, since it is larger than the sum of its proper divisors (19878262).

28691498 is a wasteful number, since it uses less digits than its factorization.

28691498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45013.

The product of its digits is 248832, while the sum is 47.

The square root of 28691498 is about 5356.4445297231. Note that the first 3 decimals coincide. The cubic root of 28691498 is about 306.1383528609.

The spelling of 28691498 in words is "twenty-eight million, six hundred ninety-one thousand, four hundred ninety-eight".