2690894640 has 160 divisors (see below), whose sum is σ = 10094353920. Its totient is φ = 578875392.

The previous prime is 2690894639. The next prime is 2690894681. The reversal of 2690894640 is 464980962.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 2690894640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18550 + ... + 75669.

It is an arithmetic number, because the mean of its divisors is an integer number (63089712).

Almost surely, 2^2690894640 is an apocalyptic number.

2690894640 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 2690894640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5047176960).

2690894640 is an abundant number, since it is smaller than the sum of its proper divisors (7403459280).

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

2690894640 is a wasteful number, since it uses less digits than its factorization.

2690894640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94259 (or 94253 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 2690894640 is about 51873.8338664109. The cubic root of 2690894640 is about 1390.9095783982.

The spelling of 2690894640 in words is "two billion, six hundred ninety million, eight hundred ninety-four thousand, six hundred forty".