28961896 has 16 divisors (see below), whose sum is σ = 54360900. Its totient is φ = 14465664.

The previous prime is 28961887. The next prime is 28961929. The reversal of 28961896 is 69816982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27941796 + 1020100 = 5286^2 + 1010^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12820 + ... + 14908.

Almost surely, 2^28961896 is an apocalyptic number.

It is an amenable number.

28961896 is a deficient number, since it is larger than the sum of its proper divisors (25399004).

28961896 is a wasteful number, since it uses less digits than its factorization.

28961896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828 (or 3824 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 28961896 is about 5381.6257766589. The cubic root of 28961896 is about 307.0970631770.

The spelling of 28961896 in words is "twenty-eight million, nine hundred sixty-one thousand, eight hundred ninety-six".