28232788 has 6 divisors (see below), whose sum is σ = 49407386. Its totient is φ = 14116392.

The previous prime is 28232779. The next prime is 28232791. The reversal of 28232788 is 88723282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25928464 + 2304324 = 5092^2 + 1518^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28232788.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3529095 + ... + 3529102.

Almost surely, 2^28232788 is an apocalyptic number.

It is an amenable number.

28232788 is a deficient number, since it is larger than the sum of its proper divisors (21174598).

28232788 is a wasteful number, since it uses less digits than its factorization.

28232788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7058201 (or 7058199 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 28232788 is about 5313.4534909040. The cubic root of 28232788 is about 304.4981013558.

The spelling of 28232788 in words is "twenty-eight million, two hundred thirty-two thousand, seven hundred eighty-eight".