2600391000 has 128 divisors (see below), whose sum is σ = 8166375360. Its totient is φ = 688896000.

The previous prime is 2600390999. The next prime is 2600391037. The reversal of 2600391000 is 1930062.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468240 + ... + 473760.

Almost surely, 2^2600391000 is an apocalyptic number.

2600391000 is a gapful number since it is divisible by the number (20) 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 2600391000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4083187680).

2600391000 is an abundant number, since it is smaller than the sum of its proper divisors (5565984360).

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

2600391000 is a wasteful number, since it uses less digits than its factorization.

2600391000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5702 (or 5688 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 2600391000 is about 50994.0290622343. The cubic root of 2600391000 is about 1375.1377933533.

The spelling of 2600391000 in words is "two billion, six hundred million, three hundred ninety-one thousand".