28380074 has 4 divisors (see below), whose sum is σ = 42570114. Its totient is φ = 14190036.

The previous prime is 28380019. The next prime is 28380083. The reversal of 28380074 is 47008382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47008382 = 2 ⋅23504191.

It can be written as a sum of positive squares in only one way, i.e., 21224449 + 7155625 = 4607^2 + 2675^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28380074.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7095017 + ... + 7095020.

Almost surely, 2^28380074 is an apocalyptic number.

28380074 is a deficient number, since it is larger than the sum of its proper divisors (14190040).

28380074 is a wasteful number, since it uses less digits than its factorization.

28380074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14190039.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28380074 is about 5327.2951861146. The cubic root of 28380074 is about 305.0266894140.

The spelling of 28380074 in words is "twenty-eight million, three hundred eighty thousand, seventy-four".