28119905 has 32 divisors (see below), whose sum is σ = 39398400. Its totient is φ = 19051200.

The previous prime is 28119899. The next prime is 28119913. The reversal of 28119905 is 50991182.

It is not a de Polignac number, because 28119905 - 2¹² = 28115809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74006 + ... + 74384.

It is an arithmetic number, because the mean of its divisors is an integer number (1231200).

Almost surely, 2^28119905 is an apocalyptic number.

It is an amenable number.

28119905 is a deficient number, since it is larger than the sum of its proper divisors (11278495).

28119905 is a wasteful number, since it uses less digits than its factorization.

28119905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 28119905 is about 5302.8204759354. The cubic root of 28119905 is about 304.0917349250.

The spelling of 28119905 in words is "twenty-eight million, one hundred nineteen thousand, nine hundred five".