13820028615 has 12 divisors (see below), whose sum is σ = 23954716344. Its totient is φ = 7370681904.

The previous prime is 13820028611. The next prime is 13820028623. The reversal of 13820028615 is 51682002831.

It is a happy number.

13820028615 is a `hidden beast` number, since 1 + 38 + 2 + 0 + 0 + 2 + 8 + 615 = 666.

It is not a de Polignac number, because 13820028615 - 2² = 13820028611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13820028615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13820028611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153555829 + ... + 153555918.

It is an arithmetic number, because the mean of its divisors is an integer number (1996226362).

Almost surely, 2^13820028615 is an apocalyptic number.

13820028615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13820028615 is a deficient number, since it is larger than the sum of its proper divisors (10134687729).

13820028615 is a wasteful number, since it uses less digits than its factorization.

13820028615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307111758 (or 307111755 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 13820028615 in words is "thirteen billion, eight hundred twenty million, twenty-eight thousand, six hundred fifteen".