28215735 has 16 divisors (see below), whose sum is σ = 46602240. Its totient is φ = 14562720.

The previous prime is 28215731. The next prime is 28215739. The reversal of 28215735 is 53751282.

It is an interprime number because it is at equal distance from previous prime (28215731) and next prime (28215739).

It is not a de Polignac number, because 28215735 - 2² = 28215731 is a prime.

It is a super-2 number, since 2×28215735² = 1592255403180450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28215696 and 28215705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28215731) 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, 29875 + ... + 30804.

It is an arithmetic number, because the mean of its divisors is an integer number (2912640).

Almost surely, 2^28215735 is an apocalyptic number.

28215735 is a deficient number, since it is larger than the sum of its proper divisors (18386505).

28215735 is a wasteful number, since it uses less digits than its factorization.

28215735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60718.

The product of its digits is 16800, while the sum is 33.

The square root of 28215735 is about 5311.8485482928. The cubic root of 28215735 is about 304.4367819667.

The spelling of 28215735 in words is "twenty-eight million, two hundred fifteen thousand, seven hundred thirty-five".