28006454 has 32 divisors (see below), whose sum is σ = 50651136. Its totient is φ = 11360160.

The previous prime is 28006453. The next prime is 28006477. The reversal of 28006454 is 45460082.

It is a super-2 number, since 2×28006454² = 1568722931308232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28006453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19712 + ... + 21084.

It is an arithmetic number, because the mean of its divisors is an integer number (1582848).

Almost surely, 2^28006454 is an apocalyptic number.

28006454 is a deficient number, since it is larger than the sum of its proper divisors (22644682).

28006454 is a wasteful number, since it uses less digits than its factorization.

28006454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 28006454 is about 5292.1124326681. The cubic root of 28006454 is about 303.6822265205.

The spelling of 28006454 in words is "twenty-eight million, six thousand, four hundred fifty-four".