28315749550 has 24 divisors (see below), whose sum is σ = 57455231112. Its totient is φ = 10296636000.

The previous prime is 28315749523. The next prime is 28315749557. The reversal of 28315749550 is 5594751382.

It is a junction number, because it is equal to n+sod(n) for n = 28315749494 and 28315749503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315749557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25741041 + ... + 25742140.

It is an arithmetic number, because the mean of its divisors is an integer number (2393967963).

Almost surely, 2^28315749550 is an apocalyptic number.

28315749550 is an abundant number, since it is smaller than the sum of its proper divisors (29139481562).

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

28315749550 is a wasteful number, since it uses less digits than its factorization.

28315749550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51483204 (or 51483199 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 49.

The spelling of 28315749550 in words is "twenty-eight billion, three hundred fifteen million, seven hundred forty-nine thousand, five hundred fifty".