28919698801 has 8 divisors (see below), whose sum is σ = 34995265920. Its totient is φ = 23330177088.

The previous prime is 28919698799. The next prime is 28919698811. The reversal of 28919698801 is 10889691982.

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 28919698801 - 2¹ = 28919698799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28919698801.

It is not an unprimeable number, because it can be changed into a prime (28919698811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121511221 + ... + 121511458.

It is an arithmetic number, because the mean of its divisors is an integer number (4374408240).

Almost surely, 2^28919698801 is an apocalyptic number.

It is an amenable number.

28919698801 is a deficient number, since it is larger than the sum of its proper divisors (6075567119).

28919698801 is a wasteful number, since it uses less digits than its factorization.

28919698801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243022703.

The product of its (nonzero) digits is 4478976, while the sum is 61.

The spelling of 28919698801 in words is "twenty-eight billion, nine hundred nineteen million, six hundred ninety-eight thousand, eight hundred one".