28457444232 has 576 divisors, whose sum is σ = 100387123200. Its totient is φ = 7508350080.

The previous prime is 28457444231. The next prime is 28457444293. The reversal of 28457444232 is 23244475482.

28457444232 is a `hidden beast` number, since 2 + 8 + 4 + 574 + 4 + 42 + 32 = 666.

It is a super-2 number, since 2×28457444232² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28457444231) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 67917319 + ... + 67917737.

It is an arithmetic number, because the mean of its divisors is an integer number (174283200).

Almost surely, 2^28457444232 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 28457444232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50193561600).

28457444232 is an abundant number, since it is smaller than the sum of its proper divisors (71929678968).

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

28457444232 is a wasteful number, since it uses less digits than its factorization.

28457444232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 485 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 45.

The spelling of 28457444232 in words is "twenty-eight billion, four hundred fifty-seven million, four hundred forty-four thousand, two hundred thirty-two".