28723627816 has 32 divisors (see below), whose sum is σ = 58028896800. Its totient is φ = 13250370240.

The previous prime is 28723627811. The next prime is 28723627817. The reversal of 28723627816 is 61872632782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (28723627811) 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, 140475 + ... + 277813.

It is an arithmetic number, because the mean of its divisors is an integer number (1813403025).

Almost surely, 2^28723627816 is an apocalyptic number.

28723627816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28723627816 is an abundant number, since it is smaller than the sum of its proper divisors (29305268984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28723627816 is a wasteful number, since it uses less digits than its factorization.

28723627816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139369 (or 139365 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The spelling of 28723627816 in words is "twenty-eight billion, seven hundred twenty-three million, six hundred twenty-seven thousand, eight hundred sixteen".