28741689 has 8 divisors (see below), whose sum is σ = 42580320. Its totient is φ = 19161108.

The previous prime is 28741649. The next prime is 28741729. The reversal of 28741689 is 98614782.

It is an interprime number because it is at equal distance from previous prime (28741649) and next prime (28741729).

It is not a de Polignac number, because 28741689 - 2⁹ = 28741177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28741649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532227 + ... + 532280.

It is an arithmetic number, because the mean of its divisors is an integer number (5322540).

Almost surely, 2^28741689 is an apocalyptic number.

It is an amenable number.

28741689 is a deficient number, since it is larger than the sum of its proper divisors (13838631).

28741689 is a wasteful number, since it uses less digits than its factorization.

28741689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064516 (or 1064510 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 28741689 is about 5361.1275866183. The cubic root of 28741689 is about 306.3167615662.

The spelling of 28741689 in words is "twenty-eight million, seven hundred forty-one thousand, six hundred eighty-nine".