28152707 has 24 divisors (see below), whose sum is σ = 32749920. Its totient is φ = 24147200.

The previous prime is 28152701. The next prime is 28152721. The reversal of 28152707 is 70725182.

It is not a de Polignac number, because 28152707 - 2¹⁴ = 28136323 is a prime.

It is a super-2 number, since 2×28152707² = 1585149822855698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28152701) 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 23 ways as a sum of consecutive naturals, for example, 249083 + ... + 249195.

It is an arithmetic number, because the mean of its divisors is an integer number (1364580).

Almost surely, 2^28152707 is an apocalyptic number.

28152707 is a deficient number, since it is larger than the sum of its proper divisors (4597213).

28152707 is a wasteful number, since it uses less digits than its factorization.

28152707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 28152707 is about 5305.9124568730. The cubic root of 28152707 is about 304.2099304528.

Adding to 28152707 its reverse (70725182), we get a palindrome (98877889).

The spelling of 28152707 in words is "twenty-eight million, one hundred fifty-two thousand, seven hundred seven".