28001154 has 16 divisors (see below), whose sum is σ = 56056320. Its totient is φ = 9324720.

The previous prime is 28001137. The next prime is 28001161. The reversal of 28001154 is 45110082.

It is a self number, because there is not a number n which added to its sum of digits gives 28001154.

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 7 ways as a sum of consecutive naturals, for example, 8287 + ... + 11165.

It is an arithmetic number, because the mean of its divisors is an integer number (3503520).

Almost surely, 2^28001154 is an apocalyptic number.

28001154 is an abundant number, since it is smaller than the sum of its proper divisors (28055166).

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

28001154 is a wasteful number, since it uses less digits than its factorization.

28001154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 28001154 is about 5291.6116637561. The cubic root of 28001154 is about 303.6630688251.

The spelling of 28001154 in words is "twenty-eight million, one thousand, one hundred fifty-four".