28061511 has 16 divisors (see below), whose sum is σ = 38169600. Its totient is φ = 18334368.

The previous prime is 28061477. The next prime is 28061519. The reversal of 28061511 is 11516082.

It is not a de Polignac number, because 28061511 - 2⁶ = 28061447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28061519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39225 + ... + 39933.

It is an arithmetic number, because the mean of its divisors is an integer number (2385600).

Almost surely, 2^28061511 is an apocalyptic number.

28061511 is a deficient number, since it is larger than the sum of its proper divisors (10108089).

28061511 is a wasteful number, since it uses less digits than its factorization.

28061511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 28061511 is about 5297.3116766904. The cubic root of 28061511 is about 303.8810960140.

Adding to 28061511 its reverse (11516082), we get a palindrome (39577593).

The spelling of 28061511 in words is "twenty-eight million, sixty-one thousand, five hundred eleven".