28057732254 has 24 divisors (see below), whose sum is σ = 60819737160. Its totient is φ = 9348272208.

The previous prime is 28057732249. The next prime is 28057732259. The reversal of 28057732254 is 45223775082.

28057732254 is a `hidden beast` number, since 2 + 8 + 0 + 577 + 3 + 22 + 54 = 666.

It is an interprime number because it is at equal distance from previous prime (28057732249) and next prime (28057732259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057732259) 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, 318457 + ... + 396900.

It is an arithmetic number, because the mean of its divisors is an integer number (2534155715).

Almost surely, 2^28057732254 is an apocalyptic number.

28057732254 is an abundant number, since it is smaller than the sum of its proper divisors (32762004906).

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

28057732254 is a wasteful number, since it uses less digits than its factorization.

28057732254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717544 (or 717541 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 28057732254 in words is "twenty-eight billion, fifty-seven million, seven hundred thirty-two thousand, two hundred fifty-four".