28051396 has 6 divisors (see below), whose sum is σ = 49089950. Its totient is φ = 14025696.

The previous prime is 28051369. The next prime is 28051403. The reversal of 28051396 is 69315082.

It can be written as a sum of positive squares in only one way, i.e., 25908100 + 2143296 = 5090^2 + 1464^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3506421 + ... + 3506428.

Almost surely, 2^28051396 is an apocalyptic number.

It is an amenable number.

28051396 is a deficient number, since it is larger than the sum of its proper divisors (21038554).

28051396 is a wasteful number, since it uses less digits than its factorization.

28051396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7012853 (or 7012851 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 28051396 is about 5296.3568610886. The cubic root of 28051396 is about 303.8445794881.

The spelling of 28051396 in words is "twenty-eight million, fifty-one thousand, three hundred ninety-six".