28961894 has 32 divisors (see below), whose sum is σ = 49170240. Its totient is φ = 12700800.

The previous prime is 28961887. The next prime is 28961929. The reversal of 28961894 is 49816982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53264 + ... + 53804.

It is an arithmetic number, because the mean of its divisors is an integer number (1536570).

Almost surely, 2^28961894 is an apocalyptic number.

28961894 is a deficient number, since it is larger than the sum of its proper divisors (20208346).

28961894 is a wasteful number, since it uses less digits than its factorization.

28961894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656.

The product of its digits is 248832, while the sum is 47.

The square root of 28961894 is about 5381.6255908415. The cubic root of 28961894 is about 307.0970561080.

The spelling of 28961894 in words is "twenty-eight million, nine hundred sixty-one thousand, eight hundred ninety-four".