28097378 has 8 divisors (see below), whose sum is σ = 42174300. Its totient is φ = 14039280.

The previous prime is 28097359. The next prime is 28097383. The reversal of 28097378 is 87379082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27071209 + 1026169 = 5203^2 + 1013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 53 + ... + 7496.

Almost surely, 2^28097378 is an apocalyptic number.

28097378 is a deficient number, since it is larger than the sum of its proper divisors (14076922).

28097378 is a wasteful number, since it uses less digits than its factorization.

28097378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9412.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 28097378 is about 5300.6959920373. The cubic root of 28097378 is about 304.0105100822.

The spelling of 28097378 in words is "twenty-eight million, ninety-seven thousand, three hundred seventy-eight".