28195115007 has 8 divisors (see below), whose sum is σ = 38467753984. Its totient is φ = 18359609688.

The previous prime is 28195114993. The next prime is 28195115021. The reversal of 28195115007 is 70051159182.

It is an interprime number because it is at equal distance from previous prime (28195114993) and next prime (28195115021).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28195115007 - 2⁶ = 28195114943 is a prime.

It is a super-2 number, since 2×28195115007² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28195115057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109283263 + ... + 109283520.

It is an arithmetic number, because the mean of its divisors is an integer number (4808469248).

Almost surely, 2^28195115007 is an apocalyptic number.

28195115007 is a deficient number, since it is larger than the sum of its proper divisors (10272638977).

28195115007 is a wasteful number, since it uses less digits than its factorization.

28195115007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218566829.

The product of its (nonzero) digits is 25200, while the sum is 39.

The spelling of 28195115007 in words is "twenty-eight billion, one hundred ninety-five million, one hundred fifteen thousand, seven".