1285878934 has 8 divisors (see below), whose sum is σ = 1928980008. Its totient is φ = 642885600.

The previous prime is 1285878931. The next prime is 1285878947. The reversal of 1285878934 is 4398785821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285878931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17694 + ... + 53710.

It is an arithmetic number, because the mean of its divisors is an integer number (241122501).

Almost surely, 2^1285878934 is an apocalyptic number.

1285878934 is a deficient number, since it is larger than the sum of its proper divisors (643101074).

1285878934 is a wasteful number, since it uses less digits than its factorization.

1285878934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53870.

The product of its digits is 3870720, while the sum is 55.

The square root of 1285878934 is about 35859.1541171846. The cubic root of 1285878934 is about 1087.4267875846.

The spelling of 1285878934 in words is "one billion, two hundred eighty-five million, eight hundred seventy-eight thousand, nine hundred thirty-four".