1285698960 has 640 divisors, whose sum is σ = 5652971520. Its totient is φ = 261273600.

The previous prime is 1285698941. The next prime is 1285698961. The reversal of 1285698960 is 698965821.

It is a happy number.

1285698960 is a `hidden beast` number, since 12 + 8 + 569 + 8 + 9 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1285698897 and 1285698906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285698961) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6093255 + ... + 6093465.

It is an arithmetic number, because the mean of its divisors is an integer number (8832768).

Almost surely, 2^1285698960 is an apocalyptic number.

1285698960 is a gapful number since it is divisible by the number (10) 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 1285698960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2826485760).

1285698960 is an abundant number, since it is smaller than the sum of its proper divisors (4367272560).

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

1285698960 is a wasteful number, since it uses less digits than its factorization.

1285698960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The square root of 1285698960 is about 35856.6445725196. The cubic root of 1285698960 is about 1087.3760524610.

The spelling of 1285698960 in words is "one billion, two hundred eighty-five million, six hundred ninety-eight thousand, nine hundred sixty".