28481728785 has 8 divisors (see below), whose sum is σ = 45570766080. Its totient is φ = 15190255344.

The previous prime is 28481728771. The next prime is 28481728799. The reversal of 28481728785 is 58782718482.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28481728771) and next prime (28481728799).

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

It is not a de Polignac number, because 28481728785 - 2⁶ = 28481728721 is a prime.

It is a super-2 number, since 2×28481728785² (a number of 22 digits) contains 22 as substring.

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, 949390945 + ... + 949390974.

It is an arithmetic number, because the mean of its divisors is an integer number (5696345760).

Almost surely, 2^28481728785 is an apocalyptic number.

It is an amenable number.

28481728785 is a deficient number, since it is larger than the sum of its proper divisors (17089037295).

28481728785 is a wasteful number, since it uses less digits than its factorization.

28481728785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898781927.

The product of its digits is 16056320, while the sum is 60.

The spelling of 28481728785 in words is "twenty-eight billion, four hundred eighty-one million, seven hundred twenty-eight thousand, seven hundred eighty-five".