28998478318 has 4 divisors (see below), whose sum is σ = 43497717480. Its totient is φ = 14499239158.

The previous prime is 28998478307. The next prime is 28998478321. The reversal of 28998478318 is 81387489982.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28998478318² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7249619578 + ... + 7249619581.

It is an arithmetic number, because the mean of its divisors is an integer number (10874429370).

Almost surely, 2^28998478318 is an apocalyptic number.

28998478318 is a deficient number, since it is larger than the sum of its proper divisors (14499239162).

28998478318 is a wasteful number, since it uses less digits than its factorization.

28998478318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14499239161.

The product of its digits is 55738368, while the sum is 67.

The spelling of 28998478318 in words is "twenty-eight billion, nine hundred ninety-eight million, four hundred seventy-eight thousand, three hundred eighteen".