28638900499 has 8 divisors (see below), whose sum is σ = 31257262080. Its totient is φ = 26023009800.

The previous prime is 28638900473. The next prime is 28638900539. The reversal of 28638900499 is 99400983682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28638900499 - 2⁹ = 28638899987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28638903499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593439 + ... + 639880.

It is an arithmetic number, because the mean of its divisors is an integer number (3907157760).

Almost surely, 2^28638900499 is an apocalyptic number.

28638900499 is a deficient number, since it is larger than the sum of its proper divisors (2618361581).

28638900499 is a wasteful number, since it uses less digits than its factorization.

28638900499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235441.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 28638900499 in words is "twenty-eight billion, six hundred thirty-eight million, nine hundred thousand, four hundred ninety-nine".