28801355 has 16 divisors (see below), whose sum is σ = 38725344. Its totient is φ = 20378880.

The previous prime is 28801351. The next prime is 28801361. The reversal of 28801355 is 55310882.

28801355 = T₂ + T₃ + ... + T₅₅₆.

It is a happy number.

It is not a de Polignac number, because 28801355 - 2² = 28801351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28801351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5042 + ... + 9111.

It is an arithmetic number, because the mean of its divisors is an integer number (2420334).

Almost surely, 2^28801355 is an apocalyptic number.

28801355 is a deficient number, since it is larger than the sum of its proper divisors (9923989).

28801355 is a wasteful number, since it uses less digits than its factorization.

28801355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14206.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 28801355 is about 5366.6893891859. The cubic root of 28801355 is about 306.5285800546.

The spelling of 28801355 in words is "twenty-eight million, eight hundred one thousand, three hundred fifty-five".