1138262878 has 8 divisors (see below), whose sum is σ = 1710396720. Its totient is φ = 568130640.

The previous prime is 1138262861. The next prime is 1138262903. The reversal of 1138262878 is 8782628311.

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

1138262878 is a modest number, since divided by 262878 gives 1138 as remainder.

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, 498978 + ... + 501253.

It is an arithmetic number, because the mean of its divisors is an integer number (213799590).

Almost surely, 2^1138262878 is an apocalyptic number.

1138262878 is a deficient number, since it is larger than the sum of its proper divisors (572133842).

1138262878 is a wasteful number, since it uses less digits than its factorization.

1138262878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000802.

The product of its digits is 258048, while the sum is 46.

The square root of 1138262878 is about 33738.1516684006. The cubic root of 1138262878 is about 1044.1130506654.

The spelling of 1138262878 in words is "one billion, one hundred thirty-eight million, two hundred sixty-two thousand, eight hundred seventy-eight".