28032455 has 8 divisors (see below), whose sum is σ = 36697104. Its totient is φ = 20387200.

The previous prime is 28032437. The next prime is 28032461. The reversal of 28032455 is 55423082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28032455 - 2²² = 23838151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254786 + ... + 254895.

It is an arithmetic number, because the mean of its divisors is an integer number (4587138).

Almost surely, 2^28032455 is an apocalyptic number.

28032455 is a deficient number, since it is larger than the sum of its proper divisors (8664649).

28032455 is a wasteful number, since it uses less digits than its factorization.

28032455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509697.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 28032455 is about 5294.5684432256. The cubic root of 28032455 is about 303.7761762851.

The spelling of 28032455 in words is "twenty-eight million, thirty-two thousand, four hundred fifty-five".