28287017420 has 12 divisors (see below), whose sum is σ = 59402736624. Its totient is φ = 11314806960.

The previous prime is 28287017399. The next prime is 28287017453. The reversal of 28287017420 is 2471078282.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 707175416 + ... + 707175455.

It is an arithmetic number, because the mean of its divisors is an integer number (4950228052).

Almost surely, 2^28287017420 is an apocalyptic number.

28287017420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28287017420 is an abundant number, since it is smaller than the sum of its proper divisors (31115719204).

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

28287017420 is a wasteful number, since it uses less digits than its factorization.

28287017420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414350880 (or 1414350878 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 41.

The spelling of 28287017420 in words is "twenty-eight billion, two hundred eighty-seven million, seventeen thousand, four hundred twenty".