1263958278 has 32 divisors (see below), whose sum is σ = 2764730880. Its totient is φ = 382044960.

The previous prime is 1263958277. The next prime is 1263958327. The reversal of 1263958278 is 8728593621.

It is a self number, because there is not a number n which added to its sum of digits gives 1263958278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263958271) 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, 2083 + ... + 50321.

It is an arithmetic number, because the mean of its divisors is an integer number (86397840).

Almost surely, 2^1263958278 is an apocalyptic number.

1263958278 is an abundant number, since it is smaller than the sum of its proper divisors (1500772602).

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

1263958278 is a wasteful number, since it uses less digits than its factorization.

1263958278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48652.

The product of its digits is 1451520, while the sum is 51.

The square root of 1263958278 is about 35552.1909029528. The cubic root of 1263958278 is about 1081.2121387034.

The spelling of 1263958278 in words is "one billion, two hundred sixty-three million, nine hundred fifty-eight thousand, two hundred seventy-eight".