28078074 has 12 divisors (see below), whose sum is σ = 60835866. Its totient is φ = 9359352.

The previous prime is 28078051. The next prime is 28078081. The reversal of 28078074 is 47087082.

It can be written as a sum of positive squares in only one way, i.e., 27092025 + 986049 = 5205^2 + 993^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 779929 + ... + 779964.

Almost surely, 2^28078074 is an apocalyptic number.

28078074 is an abundant number, since it is smaller than the sum of its proper divisors (32757792).

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

28078074 is a wasteful number, since it uses less digits than its factorization.

28078074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559901 (or 1559898 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 28078074 is about 5298.8747862164. The cubic root of 28078074 is about 303.9408717528.

The spelling of 28078074 in words is "twenty-eight million, seventy-eight thousand, seventy-four".