28370969 has 4 divisors (see below), whose sum is σ = 30950160. Its totient is φ = 25791780.

The previous prime is 28370959. The next prime is 28370981. The reversal of 28370969 is 96907382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28370969 is a prime.

It is a super-2 number, since 2×28370969² = 1609823763997922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28370929) 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 3 ways as a sum of consecutive naturals, for example, 1289579 + ... + 1289600.

It is an arithmetic number, because the mean of its divisors is an integer number (7737540).

Almost surely, 2^28370969 is an apocalyptic number.

It is an amenable number.

28370969 is a deficient number, since it is larger than the sum of its proper divisors (2579191).

28370969 is a wasteful number, since it uses less digits than its factorization.

28370969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579190.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 28370969 is about 5326.4405563190. The cubic root of 28370969 is about 304.9940659958.

The spelling of 28370969 in words is "twenty-eight million, three hundred seventy thousand, nine hundred sixty-nine".