28949472 has 36 divisors (see below), whose sum is σ = 82325880. Its totient is φ = 9649728.

The previous prime is 28949467. The next prime is 28949477. The reversal of 28949472 is 27494982.

It is an interprime number because it is at equal distance from previous prime (28949467) and next prime (28949477).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28949477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49972 + ... + 50547.

It is an arithmetic number, because the mean of its divisors is an integer number (2286830).

Almost surely, 2^28949472 is an apocalyptic number.

It is an amenable number.

28949472 is an abundant number, since it is smaller than the sum of its proper divisors (53376408).

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

28949472 is a wasteful number, since it uses less digits than its factorization.

28949472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100535 (or 100524 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28949472 is about 5380.4713548164. The cubic root of 28949472 is about 307.0531443257.

The spelling of 28949472 in words is "twenty-eight million, nine hundred forty-nine thousand, four hundred seventy-two".