28742008 has 8 divisors (see below), whose sum is σ = 53891280. Its totient is φ = 14371000.

The previous prime is 28741981. The next prime is 28742009. The reversal of 28742008 is 80024782.

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

It is a super-2 number, since 2×28742008² = 1652206047744128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28742009) 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, 1796368 + ... + 1796383.

It is an arithmetic number, because the mean of its divisors is an integer number (6736410).

Almost surely, 2^28742008 is an apocalyptic number.

It is an amenable number.

28742008 is a deficient number, since it is larger than the sum of its proper divisors (25149272).

28742008 is a wasteful number, since it uses less digits than its factorization.

28742008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592757 (or 3592753 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 28742008 is about 5361.1573377397. The cubic root of 28742008 is about 306.3178948177.

The spelling of 28742008 in words is "twenty-eight million, seven hundred forty-two thousand, eight".