28711768 has 8 divisors (see below), whose sum is σ = 53834580. Its totient is φ = 14355880.

The previous prime is 28711763. The next prime is 28711777. The reversal of 28711768 is 86711782.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 28711768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28711763) by changing a digit.

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, 1794478 + ... + 1794493.

Almost surely, 2^28711768 is an apocalyptic number.

It is an amenable number.

28711768 is a deficient number, since it is larger than the sum of its proper divisors (25122812).

28711768 is a wasteful number, since it uses less digits than its factorization.

28711768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588977 (or 3588973 counting only the distinct ones).

The product of its digits is 37632, while the sum is 40.

The square root of 28711768 is about 5358.3363089676. The cubic root of 28711768 is about 306.2104295396.

The spelling of 28711768 in words is "twenty-eight million, seven hundred eleven thousand, seven hundred sixty-eight".