28717434 has 24 divisors (see below), whose sum is σ = 62325120. Its totient is φ = 9556488.

The previous prime is 28717433. The next prime is 28717463. The reversal of 28717434 is 43471782.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28717433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15447 + ... + 17205.

It is an arithmetic number, because the mean of its divisors is an integer number (2596880).

Almost surely, 2^28717434 is an apocalyptic number.

28717434 is an abundant number, since it is smaller than the sum of its proper divisors (33607686).

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

28717434 is a wasteful number, since it uses less digits than its factorization.

28717434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674 (or 2671 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 28717434 is about 5358.8649917683. The cubic root of 28717434 is about 306.2305708068.

The spelling of 28717434 in words is "twenty-eight million, seven hundred seventeen thousand, four hundred thirty-four".