28370078 has 32 divisors (see below), whose sum is σ = 49645440. Its totient is φ = 12022560.

The previous prime is 28370077. The next prime is 28370099. The reversal of 28370078 is 87007382.

It is a happy number.

It is a super-2 number, since 2×28370078² = 1609722651452168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28370077) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 27500 + ... + 28512.

It is an arithmetic number, because the mean of its divisors is an integer number (1551420).

Almost surely, 2^28370078 is an apocalyptic number.

28370078 is a deficient number, since it is larger than the sum of its proper divisors (21275362).

28370078 is a wasteful number, since it uses less digits than its factorization.

28370078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 28370078 is about 5326.3569163172. The cubic root of 28370078 is about 304.9908731480.

The spelling of 28370078 in words is "twenty-eight million, three hundred seventy thousand, seventy-eight".