1285802878 has 8 divisors (see below), whose sum is σ = 1930063968. Its totient is φ = 642448224.

The previous prime is 1285802857. The next prime is 1285802909. The reversal of 1285802878 is 8782085821.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223051 + ... + 228742.

It is an arithmetic number, because the mean of its divisors is an integer number (241257996).

Almost surely, 2^1285802878 is an apocalyptic number.

1285802878 is a deficient number, since it is larger than the sum of its proper divisors (644261090).

1285802878 is a wasteful number, since it uses less digits than its factorization.

1285802878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453218.

The product of its (nonzero) digits is 573440, while the sum is 49.

The square root of 1285802878 is about 35858.0936191538. The cubic root of 1285802878 is about 1087.4053477844.

The spelling of 1285802878 in words is "one billion, two hundred eighty-five million, eight hundred two thousand, eight hundred seventy-eight".