28737748 has 12 divisors (see below), whose sum is σ = 54159700. Its totient is φ = 13263552.

The previous prime is 28737719. The next prime is 28737749. The reversal of 28737748 is 84773782.

It can be written as a sum of positive squares in 2 ways, for example, as 3617604 + 25120144 = 1902^2 + 5012^2 .

It is a super-2 number, since 2×28737748² = 1651716320223008, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28737698 and 28737707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28737749) 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 in 3 ways as a sum of consecutive naturals, for example, 276273 + ... + 276376.

Almost surely, 2^28737748 is an apocalyptic number.

It is an amenable number.

28737748 is a deficient number, since it is larger than the sum of its proper divisors (25421952).

28737748 is a wasteful number, since it uses less digits than its factorization.

28737748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552666 (or 552664 counting only the distinct ones).

The product of its digits is 526848, while the sum is 46.

The square root of 28737748 is about 5360.7600207433. The cubic root of 28737748 is about 306.3027604227.

It can be divided in two parts, 2873774 and 8, that added together give a palindrome (2873782).

The spelling of 28737748 in words is "twenty-eight million, seven hundred thirty-seven thousand, seven hundred forty-eight".