28372069 has 8 divisors (see below), whose sum is σ = 31060512. Its totient is φ = 25701840.

The previous prime is 28372061. The next prime is 28372079. The reversal of 28372069 is 96027382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28372069 - 2³ = 28372061 is a prime.

It is a super-2 number, since 2×28372069² = 1609948598681522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372061) 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 7 ways as a sum of consecutive naturals, for example, 1179 + ... + 7624.

It is an arithmetic number, because the mean of its divisors is an integer number (3882564).

Almost surely, 2^28372069 is an apocalyptic number.

It is an amenable number.

28372069 is a deficient number, since it is larger than the sum of its proper divisors (2688443).

28372069 is a wasteful number, since it uses less digits than its factorization.

28372069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9107.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 28372069 is about 5326.5438137689. The cubic root of 28372069 is about 304.9980076910.

The spelling of 28372069 in words is "twenty-eight million, three hundred seventy-two thousand, sixty-nine".