28404001616 has 20 divisors (see below), whose sum is σ = 57425482272. Its totient is φ = 13584522336.

The previous prime is 28404001601. The next prime is 28404001643. The reversal of 28404001616 is 61610040482.

It is a super-2 number, since 2×28404001616² (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 in 3 ways as a sum of consecutive naturals, for example, 38592026 + ... + 38592761.

Almost surely, 2^28404001616 is an apocalyptic number.

It is an amenable number.

28404001616 is an abundant number, since it is smaller than the sum of its proper divisors (29021480656).

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

28404001616 is a wasteful number, since it uses less digits than its factorization.

28404001616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77184818 (or 77184812 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 28404001616 in words is "twenty-eight billion, four hundred four million, one thousand, six hundred sixteen".