28357072 has 10 divisors (see below), whose sum is σ = 54941858. Its totient is φ = 14178528.

The previous prime is 28357057. The next prime is 28357073. The reversal of 28357072 is 27075382.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 8785296 = 4424^2 + 2964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 886143 + ... + 886174.

Almost surely, 2^28357072 is an apocalyptic number.

It is an amenable number.

28357072 is a deficient number, since it is larger than the sum of its proper divisors (26584786).

28357072 is a wasteful number, since it uses less digits than its factorization.

28357072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772325 (or 1772319 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 28357072 is about 5325.1358668113. The cubic root of 28357072 is about 304.9442592753.

The spelling of 28357072 in words is "twenty-eight million, three hundred fifty-seven thousand, seventy-two".