28425011 has 4 divisors (see below), whose sum is σ = 28441392. Its totient is φ = 28408632.

The previous prime is 28424993. The next prime is 28425029. The reversal of 28425011 is 11052482.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28424993) and next prime (28425029).

It is a cyclic number.

It is not a de Polignac number, because 28425011 - 2⁶ = 28424947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28425031) 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, 5231 + ... + 9176.

It is an arithmetic number, because the mean of its divisors is an integer number (7110348).

Almost surely, 2^28425011 is an apocalyptic number.

28425011 is a deficient number, since it is larger than the sum of its proper divisors (16381).

28425011 is a wasteful number, since it uses less digits than its factorization.

28425011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16380.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 28425011 is about 5331.5111366291. The cubic root of 28425011 is about 305.1875975703.

Adding to 28425011 its reverse (11052482), we get a palindrome (39477493).

The spelling of 28425011 in words is "twenty-eight million, four hundred twenty-five thousand, eleven".