28480994 has 4 divisors (see below), whose sum is σ = 42721494. Its totient is φ = 14240496.

The previous prime is 28480993. The next prime is 28480999. The reversal of 28480994 is 49908482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28462225 + 18769 = 5335^2 + 137^2 .

It is a super-2 number, since 2×28480994² = 1622334038456072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28480993) 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 as a sum of consecutive naturals, namely, 7120247 + ... + 7120250.

Almost surely, 2^28480994 is an apocalyptic number.

28480994 is a deficient number, since it is larger than the sum of its proper divisors (14240500).

28480994 is a wasteful number, since it uses less digits than its factorization.

28480994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14240499.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 28480994 is about 5336.7587541503. The cubic root of 28480994 is about 305.3878216269.

The spelling of 28480994 in words is "twenty-eight million, four hundred eighty thousand, nine hundred ninety-four".