28571433772 has 24 divisors (see below), whose sum is σ = 57381972480. Its totient is φ = 12193663440.

The previous prime is 28571433767. The next prime is 28571433797. The reversal of 28571433772 is 27733417582.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2128054 + ... + 2141437.

It is an arithmetic number, because the mean of its divisors is an integer number (2390915520).

Almost surely, 2^28571433772 is an apocalyptic number.

It is an amenable number.

28571433772 is an abundant number, since it is smaller than the sum of its proper divisors (28810538708).

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

28571433772 is a wasteful number, since it uses less digits than its factorization.

28571433772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269741 (or 4269739 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 49.

The spelling of 28571433772 in words is "twenty-eight billion, five hundred seventy-one million, four hundred thirty-three thousand, seven hundred seventy-two".