28572538434 has 64 divisors (see below), whose sum is σ = 65989693440. Its totient is φ = 8165344320.

The previous prime is 28572538427. The next prime is 28572538439. The reversal of 28572538434 is 43483527582.

It is not an unprimeable number, because it can be changed into a prime (28572538439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91282 + ... + 255885.

It is an arithmetic number, because the mean of its divisors is an integer number (1031088960).

Almost surely, 2^28572538434 is an apocalyptic number.

28572538434 is an abundant number, since it is smaller than the sum of its proper divisors (37417155006).

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

28572538434 is a wasteful number, since it uses less digits than its factorization.

28572538434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347255.

The product of its digits is 6451200, while the sum is 51.

The spelling of 28572538434 in words is "twenty-eight billion, five hundred seventy-two million, five hundred thirty-eight thousand, four hundred thirty-four".