28614445440 has 128 divisors (see below), whose sum is σ = 104238385920. Its totient is φ = 6540441600.

The previous prime is 28614445427. The next prime is 28614445481. The reversal of 28614445440 is 4454441682.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 28614445392 and 28614445401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051086 + ... + 1077965.

It is an arithmetic number, because the mean of its divisors is an integer number (814362390).

Almost surely, 2^28614445440 is an apocalyptic number.

28614445440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28614445440 is an abundant number, since it is smaller than the sum of its proper divisors (75623940480).

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

28614445440 is a wasteful number, since it uses less digits than its factorization.

28614445440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129080 (or 2129068 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 42.

The spelling of 28614445440 in words is "twenty-eight billion, six hundred fourteen million, four hundred forty-five thousand, four hundred forty".