28607069 has 4 divisors (see below), whose sum is σ = 28628544. Its totient is φ = 28585596.

The previous prime is 28607063. The next prime is 28607071. The reversal of 28607069 is 96070682.

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 not a de Polignac number, because 28607069 - 2¹⁶ = 28541533 is a prime.

It is a super-2 number, since 2×28607069² = 1636728793541522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28607063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8597 + ... + 11450.

It is an arithmetic number, because the mean of its divisors is an integer number (7157136).

Almost surely, 2^28607069 is an apocalyptic number.

It is an amenable number.

28607069 is a deficient number, since it is larger than the sum of its proper divisors (21475).

28607069 is a wasteful number, since it uses less digits than its factorization.

28607069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21474.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 28607069 is about 5348.5576560415. The cubic root of 28607069 is about 305.8377719552.

The spelling of 28607069 in words is "twenty-eight million, six hundred seven thousand, sixty-nine".