28440196 has 6 divisors (see below), whose sum is σ = 49770350. Its totient is φ = 14220096.

The previous prime is 28440187. The next prime is 28440221. The reversal of 28440196 is 69104482.

It can be written as a sum of positive squares in only one way, i.e., 27185796 + 1254400 = 5214^2 + 1120^2 .

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, 3555021 + ... + 3555028.

Almost surely, 2^28440196 is an apocalyptic number.

It is an amenable number.

28440196 is a deficient number, since it is larger than the sum of its proper divisors (21330154).

28440196 is a wasteful number, since it uses less digits than its factorization.

28440196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110053 (or 7110051 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28440196 is about 5332.9350267934. The cubic root of 28440196 is about 305.2419329194.

The spelling of 28440196 in words is "twenty-eight million, four hundred forty thousand, one hundred ninety-six".