28697832 has 24 divisors (see below), whose sum is σ = 77723490. Its totient is φ = 9565920.

The previous prime is 28697821. The next prime is 28697839. The reversal of 28697832 is 23879682.

It can be written as a sum of positive squares in only one way, i.e., 16208676 + 12489156 = 4026^2 + 3534^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (28697839) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199219 + ... + 199362.

Almost surely, 2^28697832 is an apocalyptic number.

It is an amenable number.

28697832 is an abundant number, since it is smaller than the sum of its proper divisors (49025658).

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

28697832 is a wasteful number, since it uses less digits than its factorization.

28697832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398593 (or 398586 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28697832 is about 5357.0357475007. The cubic root of 28697832 is about 306.1608791351.

It can be divided in two parts, 2869 and 7832, that added together give a palindrome (10701).

The spelling of 28697832 in words is "twenty-eight million, six hundred ninety-seven thousand, eight hundred thirty-two".