1285870870 has 8 divisors (see below), whose sum is σ = 2314567584. Its totient is φ = 514348344.

The previous prime is 1285870853. The next prime is 1285870889. The reversal of 1285870870 is 780785821.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1285870870.

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, 64293534 + ... + 64293553.

It is an arithmetic number, because the mean of its divisors is an integer number (289320948).

Almost surely, 2^1285870870 is an apocalyptic number.

1285870870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285870870 is a deficient number, since it is larger than the sum of its proper divisors (1028696714).

1285870870 is a wasteful number, since it uses less digits than its factorization.

1285870870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128587094.

The product of its (nonzero) digits is 250880, while the sum is 46.

The square root of 1285870870 is about 35859.0416771001. The cubic root of 1285870870 is about 1087.4245144241.

The spelling of 1285870870 in words is "one billion, two hundred eighty-five million, eight hundred seventy thousand, eight hundred seventy".