28540472 has 8 divisors (see below), whose sum is σ = 53513400. Its totient is φ = 14270232.

The previous prime is 28540441. The next prime is 28540507. The reversal of 28540472 is 27404582.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1783772 + ... + 1783787.

It is an arithmetic number, because the mean of its divisors is an integer number (6689175).

Almost surely, 2^28540472 is an apocalyptic number.

It is an amenable number.

28540472 is a deficient number, since it is larger than the sum of its proper divisors (24972928).

28540472 is a wasteful number, since it uses less digits than its factorization.

28540472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567565 (or 3567561 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 28540472 is about 5342.3283313552. The cubic root of 28540472 is about 305.6002583534.

The spelling of 28540472 in words is "twenty-eight million, five hundred forty thousand, four hundred seventy-two".