28072994 has 16 divisors (see below), whose sum is σ = 44474400. Its totient is φ = 13253184.

The previous prime is 28072991. The next prime is 28072997. The reversal of 28072994 is 49927082.

It is an interprime number because it is at equal distance from previous prime (28072991) and next prime (28072997).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28072991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12122 + ... + 14250.

It is an arithmetic number, because the mean of its divisors is an integer number (2779650).

Almost surely, 2^28072994 is an apocalyptic number.

28072994 is a deficient number, since it is larger than the sum of its proper divisors (16401406).

28072994 is a wasteful number, since it uses less digits than its factorization.

28072994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 28072994 is about 5298.3954174825. The cubic root of 28072994 is about 303.9225405720.

The spelling of 28072994 in words is "twenty-eight million, seventy-two thousand, nine hundred ninety-four".