1285866830 has 8 divisors (see below), whose sum is σ = 2314560312. Its totient is φ = 514346728.

The previous prime is 1285866779. The next prime is 1285866833. The reversal of 1285866830 is 386685821.

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 (1285866833) 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, 64293332 + ... + 64293351.

It is an arithmetic number, because the mean of its divisors is an integer number (289320039).

Almost surely, 2^1285866830 is an apocalyptic number.

1285866830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1285866830 is a deficient number, since it is larger than the sum of its proper divisors (1028693482).

1285866830 is a wasteful number, since it uses less digits than its factorization.

1285866830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128586690.

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 1285866830 is about 35858.9853453775. The cubic root of 1285866830 is about 1087.4233755851.

The spelling of 1285866830 in words is "one billion, two hundred eighty-five million, eight hundred sixty-six thousand, eight hundred thirty".