278332500028 has 12 divisors (see below), whose sum is σ = 531362045592. Its totient is φ = 126514772720.

The previous prime is 278332499981. The next prime is 278332500071. The reversal of 278332500028 is 820005233872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3162869275 + ... + 3162869362.

It is an arithmetic number, because the mean of its divisors is an integer number (44280170466).

Almost surely, 2^278332500028 is an apocalyptic number.

It is an amenable number.

278332500028 is a deficient number, since it is larger than the sum of its proper divisors (253029545564).

278332500028 is a wasteful number, since it uses less digits than its factorization.

278332500028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6325738652 (or 6325738650 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 278332500028 in words is "two hundred seventy-eight billion, three hundred thirty-two million, five hundred thousand, twenty-eight".