1285350864 has 80 divisors (see below), whose sum is σ = 3809220480. Its totient is φ = 365852160.

The previous prime is 1285350839. The next prime is 1285350907. The reversal of 1285350864 is 4680535821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83274 + ... + 97494.

It is an arithmetic number, because the mean of its divisors is an integer number (47615256).

Almost surely, 2^1285350864 is an apocalyptic number.

1285350864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285350864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904610240).

1285350864 is an abundant number, since it is smaller than the sum of its proper divisors (2523869616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285350864 is a wasteful number, since it uses less digits than its factorization.

1285350864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14508 (or 14502 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 1285350864 is about 35851.7902481870. The cubic root of 1285350864 is about 1087.2779098861.

The spelling of 1285350864 in words is "one billion, two hundred eighty-five million, three hundred fifty thousand, eight hundred sixty-four".