28190956 has 6 divisors (see below), whose sum is σ = 49334180. Its totient is φ = 14095476.

The previous prime is 28190941. The next prime is 28190983. The reversal of 28190956 is 65909182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3523866 + ... + 3523873.

Almost surely, 2^28190956 is an apocalyptic number.

It is an amenable number.

28190956 is a deficient number, since it is larger than the sum of its proper divisors (21143224).

28190956 is a wasteful number, since it uses less digits than its factorization.

28190956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047743 (or 7047741 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 28190956 is about 5309.5156087914. The cubic root of 28190956 is about 304.3476372823.

The spelling of 28190956 in words is "twenty-eight million, one hundred ninety thousand, nine hundred fifty-six".