28457450838 has 12 divisors (see below), whose sum is σ = 61657810188. Its totient is φ = 9485816940.

The previous prime is 28457450837. The next prime is 28457450851. The reversal of 28457450838 is 83805475482.

28457450838 is a `hidden beast` number, since 2 + 84 + 57 + 4 + 508 + 3 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28457450831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 790484728 + ... + 790484763.

It is an arithmetic number, because the mean of its divisors is an integer number (5138150849).

Almost surely, 2^28457450838 is an apocalyptic number.

28457450838 is an abundant number, since it is smaller than the sum of its proper divisors (33200359350).

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

28457450838 is a wasteful number, since it uses less digits than its factorization.

28457450838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580969499 (or 1580969496 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 54.

The spelling of 28457450838 in words is "twenty-eight billion, four hundred fifty-seven million, four hundred fifty thousand, eight hundred thirty-eight".