278632763628 has 48 divisors (see below), whose sum is σ = 673899367680. Its totient is φ = 89496576064.

The previous prime is 278632763623. The next prime is 278632763713. The reversal of 278632763628 is 826367236872.

It is not an unprimeable number, because it can be changed into a prime (278632763623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620850 + ... + 970937.

It is an arithmetic number, because the mean of its divisors is an integer number (14039570160).

Almost surely, 2^278632763628 is an apocalyptic number.

It is an amenable number.

278632763628 is an abundant number, since it is smaller than the sum of its proper divisors (395266604052).

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

278632763628 is a wasteful number, since it uses less digits than its factorization.

278632763628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592326 (or 1592324 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 60.

The spelling of 278632763628 in words is "two hundred seventy-eight billion, six hundred thirty-two million, seven hundred sixty-three thousand, six hundred twenty-eight".