28020476748 has 72 divisors (see below), whose sum is σ = 72206572480. Its totient is φ = 8450719200.

The previous prime is 28020476747. The next prime is 28020476749. The reversal of 28020476748 is 84767402082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28020476747) and next prime (28020476749).

It is a junction number, because it is equal to n+sod(n) for n = 28020476697 and 28020476706.

It is not an unprimeable number, because it can be changed into a prime (28020476747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260643 + ... + 352101.

Almost surely, 2^28020476748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28020476748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36103286240).

28020476748 is an abundant number, since it is smaller than the sum of its proper divisors (44186095732).

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

28020476748 is a wasteful number, since it uses less digits than its factorization.

28020476748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91699 (or 91686 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 48.

The spelling of 28020476748 in words is "twenty-eight billion, twenty million, four hundred seventy-six thousand, seven hundred forty-eight".