28571982 has 16 divisors (see below), whose sum is σ = 58222800. Its totient is φ = 9344192.

The previous prime is 28571969. The next prime is 28571993. The reversal of 28571982 is 28917582.

It is a congruent number.

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, 44607 + ... + 45242.

It is an arithmetic number, because the mean of its divisors is an integer number (3638925).

Almost surely, 2^28571982 is an apocalyptic number.

28571982 is an abundant number, since it is smaller than the sum of its proper divisors (29650818).

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

28571982 is a wasteful number, since it uses less digits than its factorization.

28571982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89907.

The product of its digits is 80640, while the sum is 42.

The square root of 28571982 is about 5345.2766065004. The cubic root of 28571982 is about 305.7126825923.

The spelling of 28571982 in words is "twenty-eight million, five hundred seventy-one thousand, nine hundred eighty-two".