28738743855 has 8 divisors (see below), whose sum is σ = 45981990192. Its totient is φ = 15327330048.

The previous prime is 28738743829. The next prime is 28738743881. The reversal of 28738743855 is 55834783782.

It is an interprime number because it is at equal distance from previous prime (28738743829) and next prime (28738743881).

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

It is not a de Polignac number, because 28738743855 - 2⁶ = 28738743791 is a prime.

It is a super-2 number, since 2×28738743855² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957958114 + ... + 957958143.

It is an arithmetic number, because the mean of its divisors is an integer number (5747748774).

Almost surely, 2^28738743855 is an apocalyptic number.

28738743855 is a deficient number, since it is larger than the sum of its proper divisors (17243246337).

28738743855 is a wasteful number, since it uses less digits than its factorization.

28738743855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915916265.

The product of its digits is 45158400, while the sum is 60.

The spelling of 28738743855 in words is "twenty-eight billion, seven hundred thirty-eight million, seven hundred forty-three thousand, eight hundred fifty-five".