28624069 has 4 divisors (see below), whose sum is σ = 28784160. Its totient is φ = 28463980.

The previous prime is 28624033. The next prime is 28624087. The reversal of 28624069 is 96042682.

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 28624069 - 2¹³ = 28615877 is a prime.

It is a super-2 number, since 2×28624069² = 1638674652233522, 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 (28624669) 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, 79777 + ... + 80134.

It is an arithmetic number, because the mean of its divisors is an integer number (7196040).

Almost surely, 2^28624069 is an apocalyptic number.

It is an amenable number.

28624069 is a deficient number, since it is larger than the sum of its proper divisors (160091).

28624069 is a wasteful number, since it uses less digits than its factorization.

28624069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160090.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 28624069 is about 5350.1466335045. The cubic root of 28624069 is about 305.8983422122.

The spelling of 28624069 in words is "twenty-eight million, six hundred twenty-four thousand, sixty-nine".