28149064 has 8 divisors (see below), whose sum is σ = 52779510. Its totient is φ = 14074528.

The previous prime is 28149061. The next prime is 28149071. The reversal of 28149064 is 46094182.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 8168164 = 4470^2 + 2858^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28149061) 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, 1759309 + ... + 1759324.

Almost surely, 2^28149064 is an apocalyptic number.

It is an amenable number.

28149064 is a deficient number, since it is larger than the sum of its proper divisors (24630446).

28149064 is a wasteful number, since it uses less digits than its factorization.

28149064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518639 (or 3518635 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28149064 is about 5305.5691494881. The cubic root of 28149064 is about 304.1968081554.

The spelling of 28149064 in words is "twenty-eight million, one hundred forty-nine thousand, sixty-four".