28409949263748 has 192 divisors, whose sum is σ = 72743652495360. Its totient is φ = 8577330278400.

The previous prime is 28409949263737. The next prime is 28409949263749. The reversal of 28409949263748 is 84736294990482.

It is a self number, because there is not a number n which added to its sum of digits gives 28409949263748.

It is not an unprimeable number, because it can be changed into a prime (28409949263749) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2321257813 + ... + 2321270051.

It is an arithmetic number, because the mean of its divisors is an integer number (378873190080).

Almost surely, 2^{28409949263748} 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 28409949263748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36371826247680).

28409949263748 is an abundant number, since it is smaller than the sum of its proper divisors (44333703231612).

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

28409949263748 is a wasteful number, since it uses less digits than its factorization.

28409949263748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13658 (or 13656 counting only the distinct ones).

The product of its (nonzero) digits is 1504935936, while the sum is 75.

The spelling of 28409949263748 in words is "twenty-eight trillion, four hundred nine billion, nine hundred forty-nine million, two hundred sixty-three thousand, seven hundred forty-eight".