28589738 has 4 divisors (see below), whose sum is σ = 42884610. Its totient is φ = 14294868.

The previous prime is 28589681. The next prime is 28589741. The reversal of 28589738 is 83798582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26553409 + 2036329 = 5153^2 + 1427^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7147433 + ... + 7147436.

Almost surely, 2^28589738 is an apocalyptic number.

28589738 is a deficient number, since it is larger than the sum of its proper divisors (14294872).

28589738 is a wasteful number, since it uses less digits than its factorization.

28589738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14294871.

The product of its digits is 967680, while the sum is 50.

The square root of 28589738 is about 5346.9372541671. The cubic root of 28589738 is about 305.7759976530.

The spelling of 28589738 in words is "twenty-eight million, five hundred eighty-nine thousand, seven hundred thirty-eight".