28078371 has 12 divisors (see below), whose sum is σ = 42692520. Its totient is φ = 17733600.

The previous prime is 28078367. The next prime is 28078381. The reversal of 28078371 is 17387082.

28078371 is a `hidden beast` number, since 280 + 7 + 8 + 371 = 666.

It is not a de Polignac number, because 28078371 - 2² = 28078367 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28078381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81930 + ... + 82271.

It is an arithmetic number, because the mean of its divisors is an integer number (3557710).

Almost surely, 2^28078371 is an apocalyptic number.

28078371 is a deficient number, since it is larger than the sum of its proper divisors (14614149).

28078371 is a wasteful number, since it uses less digits than its factorization.

28078371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164226 (or 164223 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 28078371 is about 5298.9028109600. The cubic root of 28078371 is about 303.9419434089.

The spelling of 28078371 in words is "twenty-eight million, seventy-eight thousand, three hundred seventy-one".