28390480052 has 12 divisors (see below), whose sum is σ = 54200007456. Its totient is φ = 12904763640.

The previous prime is 28390480051. The next prime is 28390480057. The reversal of 28390480052 is 25008409382.

It is a junction number, because it is equal to n+sod(n) for n = 28390479991 and 28390480009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28390480051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322619048 + ... + 322619135.

It is an arithmetic number, because the mean of its divisors is an integer number (4516667288).

Almost surely, 2^28390480052 is an apocalyptic number.

28390480052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28390480052 is a deficient number, since it is larger than the sum of its proper divisors (25809527404).

28390480052 is a wasteful number, since it uses less digits than its factorization.

28390480052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645238198 (or 645238196 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 28390480052 in words is "twenty-eight billion, three hundred ninety million, four hundred eighty thousand, fifty-two".