28849040 has 40 divisors (see below), whose sum is σ = 73173888. Its totient is φ = 10490240.

The previous prime is 28849031. The next prime is 28849063. The reversal of 28849040 is 4094882.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15512 + ... + 17271.

Almost surely, 2^28849040 is an apocalyptic number.

28849040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28849040 is an abundant number, since it is smaller than the sum of its proper divisors (44324848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28849040 is a wasteful number, since it uses less digits than its factorization.

28849040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32807 (or 32801 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28849040 is about 5371.1302348761. The cubic root of 28849040 is about 306.6976549236.

The spelling of 28849040 in words is "twenty-eight million, eight hundred forty-nine thousand, forty".