28372007 has 4 divisors (see below), whose sum is σ = 29138856. Its totient is φ = 27605160.

The previous prime is 28371991. The next prime is 28372009. The reversal of 28372007 is 70027382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70027382 = 2 ⋅35013691.

It is a cyclic number.

It is not a de Polignac number, because 28372007 - 2⁴ = 28371991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372009) 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 3 ways as a sum of consecutive naturals, for example, 383369 + ... + 383442.

It is an arithmetic number, because the mean of its divisors is an integer number (7284714).

Almost surely, 2^28372007 is an apocalyptic number.

28372007 is a deficient number, since it is larger than the sum of its proper divisors (766849).

28372007 is an equidigital number, since it uses as much as digits as its factorization.

28372007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766848.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 28372007 is about 5326.5379938568. The cubic root of 28372007 is about 304.9977855254.

Adding to 28372007 its reverse (70027382), we get a palindrome (98399389).

The spelling of 28372007 in words is "twenty-eight million, three hundred seventy-two thousand, seven".