28890490460 has 48 divisors (see below), whose sum is σ = 65983915872. Its totient is φ = 10561632000.

The previous prime is 28890490423. The next prime is 28890490477. The reversal of 28890490460 is 6409409882.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28890490399 and 28890490408.

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, 523826 + ... + 576345.

It is an arithmetic number, because the mean of its divisors is an integer number (1374664914).

Almost surely, 2^28890490460 is an apocalyptic number.

28890490460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28890490460 is an abundant number, since it is smaller than the sum of its proper divisors (37093425412).

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

28890490460 is a wasteful number, since it uses less digits than its factorization.

28890490460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100294 (or 1100292 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 28890490460 in words is "twenty-eight billion, eight hundred ninety million, four hundred ninety thousand, four hundred sixty".