1000860840 has 256 divisors, whose sum is σ = 3907008000. Its totient is φ = 223119360.

The previous prime is 1000860821. The next prime is 1000860859. The reversal of 1000860840 is 480680001.

1000860840 is a `hidden beast` number, since 10 + 0 + 0 + 8 + 608 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (1000860821) and next prime (1000860859).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 308346 + ... + 311574.

It is an arithmetic number, because the mean of its divisors is an integer number (15261750).

Almost surely, 2^1000860840 is an apocalyptic number.

1000860840 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 1000860840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1953504000).

1000860840 is an abundant number, since it is smaller than the sum of its proper divisors (2906147160).

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

1000860840 is a wasteful number, since it uses less digits than its factorization.

1000860840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297 (or 3287 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1000860840 is about 31636.3847492093. The cubic root of 1000860840 is about 1000.2868643676.

The spelling of 1000860840 in words is "one billion, eight hundred sixty thousand, eight hundred forty".