28071554 has 32 divisors (see below), whose sum is σ = 50429952. Its totient is φ = 11466000.

The previous prime is 28071541. The next prime is 28071577. The reversal of 28071554 is 45517082.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28071554.

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 15 ways as a sum of consecutive naturals, for example, 30359 + ... + 31269.

It is an arithmetic number, because the mean of its divisors is an integer number (1575936).

Almost surely, 2^28071554 is an apocalyptic number.

28071554 is a deficient number, since it is larger than the sum of its proper divisors (22358398).

28071554 is a wasteful number, since it uses less digits than its factorization.

28071554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 28071554 is about 5298.2595255423. The cubic root of 28071554 is about 303.9173439295.

The spelling of 28071554 in words is "twenty-eight million, seventy-one thousand, five hundred fifty-four".