28961895 has 8 divisors (see below), whose sum is σ = 46339056. Its totient is φ = 15446336.

The previous prime is 28961887. The next prime is 28961929. The reversal of 28961895 is 59816982.

It is a happy number.

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 28961895 - 2³ = 28961887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965382 + ... + 965411.

It is an arithmetic number, because the mean of its divisors is an integer number (5792382).

Almost surely, 2^28961895 is an apocalyptic number.

28961895 is a deficient number, since it is larger than the sum of its proper divisors (17377161).

28961895 is a wasteful number, since it uses less digits than its factorization.

28961895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930801.

The product of its digits is 311040, while the sum is 48.

The square root of 28961895 is about 5381.6256837502. The cubic root of 28961895 is about 307.0970596425.

The spelling of 28961895 in words is "twenty-eight million, nine hundred sixty-one thousand, eight hundred ninety-five".