28123814438748 has 72 divisors (see below), whose sum is σ = 83228198857440. Its totient is φ = 7839390781440.

The previous prime is 28123814438729. The next prime is 28123814438749. The reversal of 28123814438748 is 84783441832182.

28123814438748 is a `hidden beast` number, since 2 + 8 + 1 + 238 + 14 + 4 + 387 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28123814438749) 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, 1360995013 + ... + 1361015676.

Almost surely, 2^{28123814438748} is an apocalyptic number.

28123814438748 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28123814438748 is an abundant number, since it is smaller than the sum of its proper divisors (55104384418692).

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

28123814438748 is a wasteful number, since it uses less digits than its factorization.

28123814438748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722010747 (or 2722010742 counting only the distinct ones).

The product of its digits is 66060288, while the sum is 63.

The spelling of 28123814438748 in words is "twenty-eight trillion, one hundred twenty-three billion, eight hundred fourteen million, four hundred thirty-eight thousand, seven hundred forty-eight".