28893447380 has 48 divisors (see below), whose sum is σ = 69359068800. Its totient is φ = 9904211328.

The previous prime is 28893447277. The next prime is 28893447409. The reversal of 28893447380 is 8374439882.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727271 + ... + 765969.

It is an arithmetic number, because the mean of its divisors is an integer number (1444980600).

Almost surely, 2^28893447380 is an apocalyptic number.

28893447380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28893447380 is an abundant number, since it is smaller than the sum of its proper divisors (40465621420).

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

28893447380 is a wasteful number, since it uses less digits than its factorization.

28893447380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44048 (or 44046 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 28893447380 in words is "twenty-eight billion, eight hundred ninety-three million, four hundred forty-seven thousand, three hundred eighty".