28571432 has 8 divisors (see below), whose sum is σ = 53571450. Its totient is φ = 14285712.

The previous prime is 28571423. The next prime is 28571449. The reversal of 28571432 is 23417582.

It can be written as a sum of positive squares in only one way, i.e., 18369796 + 10201636 = 4286^2 + 3194^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1785707 + ... + 1785722.

Almost surely, 2^28571432 is an apocalyptic number.

It is an amenable number.

28571432 is a deficient number, since it is larger than the sum of its proper divisors (25000018).

28571432 is a wasteful number, since it uses less digits than its factorization.

28571432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571435 (or 3571431 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 28571432 is about 5345.2251589620. The cubic root of 28571432 is about 305.7107209613.

It can be divided in two parts, 285 and 71432, that added together give a palindrome (71717).

The spelling of 28571432 in words is "twenty-eight million, five hundred seventy-one thousand, four hundred thirty-two".