28378296 has 32 divisors (see below), whose sum is σ = 78829200. Its totient is φ = 9459360.

The previous prime is 28378291. The next prime is 28378313. The reversal of 28378296 is 69287382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28378291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65475 + ... + 65906.

Almost surely, 2^28378296 is an apocalyptic number.

It is an amenable number.

28378296 is an abundant number, since it is smaller than the sum of its proper divisors (50450904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28378296 is a wasteful number, since it uses less digits than its factorization.

28378296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131396 (or 131386 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28378296 is about 5327.1283070713. The cubic root of 28378296 is about 305.0203193486.

The spelling of 28378296 in words is "twenty-eight million, three hundred seventy-eight thousand, two hundred ninety-six".