28953551 has 8 divisors (see below), whose sum is σ = 32258304. Its totient is φ = 25760920.

The previous prime is 28953539. The next prime is 28953553. The reversal of 28953551 is 15535982.

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

It is a cyclic number.

It is not a de Polignac number, because 28953551 - 2⁶ = 28953487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28953553) by changing a digit.

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, 27485 + ... + 28518.

It is an arithmetic number, because the mean of its divisors is an integer number (4032288).

Almost surely, 2^28953551 is an apocalyptic number.

28953551 is a deficient number, since it is larger than the sum of its proper divisors (3304753).

28953551 is a wasteful number, since it uses less digits than its factorization.

28953551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56061.

The product of its digits is 54000, while the sum is 38.

The square root of 28953551 is about 5380.8503974744. The cubic root of 28953551 is about 307.0675649797.

Subtracting from 28953551 its reverse (15535982), we obtain a square (13417569 = 3663²).

It can be divided in two parts, 2895 and 3551, that added together give a palindrome (6446).

The spelling of 28953551 in words is "twenty-eight million, nine hundred fifty-three thousand, five hundred fifty-one".