28015005 has 32 divisors (see below), whose sum is σ = 46189440. Its totient is φ = 14493440.

The previous prime is 28015003. The next prime is 28015007. The reversal of 28015005 is 50051082.

It is an interprime number because it is at equal distance from previous prime (28015003) and next prime (28015007).

It is not a de Polignac number, because 28015005 - 2¹ = 28015003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28015003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104011 + ... + 104279.

It is an arithmetic number, because the mean of its divisors is an integer number (1443420).

Almost surely, 2^28015005 is an apocalyptic number.

It is an amenable number.

28015005 is a deficient number, since it is larger than the sum of its proper divisors (18174435).

28015005 is a wasteful number, since it uses less digits than its factorization.

28015005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 28015005 is about 5292.9202714570. The cubic root of 28015005 is about 303.7131303790.

Adding to 28015005 its reverse (50051082), we get a palindrome (78066087).

The spelling of 28015005 in words is "twenty-eight million, fifteen thousand, five".