1258733878 has 8 divisors (see below), whose sum is σ = 1888498368. Its totient is φ = 629234424.

The previous prime is 1258733863. The next prime is 1258733881. The reversal of 1258733878 is 8783378521.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53926 + ... + 73657.

It is an arithmetic number, because the mean of its divisors is an integer number (236062296).

Almost surely, 2^1258733878 is an apocalyptic number.

1258733878 is a deficient number, since it is larger than the sum of its proper divisors (629764490).

1258733878 is a wasteful number, since it uses less digits than its factorization.

1258733878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132518.

The product of its digits is 2257920, while the sum is 52.

The square root of 1258733878 is about 35478.6397428086. The cubic root of 1258733878 is about 1079.7204003005.

The spelling of 1258733878 in words is "one billion, two hundred fifty-eight million, seven hundred thirty-three thousand, eight hundred seventy-eight".