28434748 has 6 divisors (see below), whose sum is σ = 49760816. Its totient is φ = 14217372.

The previous prime is 28434691. The next prime is 28434767. The reversal of 28434748 is 84743482.

It is a self number, because there is not a number n which added to its sum of digits gives 28434748.

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, 3554340 + ... + 3554347.

Almost surely, 2^28434748 is an apocalyptic number.

It is an amenable number.

28434748 is a deficient number, since it is larger than the sum of its proper divisors (21326068).

28434748 is a wasteful number, since it uses less digits than its factorization.

28434748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7108691 (or 7108689 counting only the distinct ones).

The product of its digits is 172032, while the sum is 40.

The square root of 28434748 is about 5332.4242141825. The cubic root of 28434748 is about 305.2224409740. Note that the first 3 decimals are identical.

It can be divided in two parts, 2843474 and 8, that added together give a palindrome (2843482).

The spelling of 28434748 in words is "twenty-eight million, four hundred thirty-four thousand, seven hundred forty-eight".