28905863490 has 48 divisors (see below), whose sum is σ = 85891710528. Its totient is φ = 6607054368.

The previous prime is 28905863447. The next prime is 28905863507. The reversal of 28905863490 is 9436850982.

28905863490 is a `hidden beast` number, since 2 + 8 + 90 + 5 + 8 + 63 + 490 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22940532 + ... + 22941791.

It is an arithmetic number, because the mean of its divisors is an integer number (1789410636).

Almost surely, 2^28905863490 is an apocalyptic number.

28905863490 is an abundant number, since it is smaller than the sum of its proper divisors (56985847038).

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

28905863490 is a wasteful number, since it uses less digits than its factorization.

28905863490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45882343 (or 45882340 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 28905863490 in words is "twenty-eight billion, nine hundred five million, eight hundred sixty-three thousand, four hundred ninety".