2690910640 has 80 divisors (see below), whose sum is σ = 6911700480. Its totient is φ = 966101760.

The previous prime is 2690910623. The next prime is 2690910653. The reversal of 2690910640 is 460190962.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 2690910640.

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, 50167 + ... + 88873.

It is an arithmetic number, because the mean of its divisors is an integer number (86396256).

Almost surely, 2^2690910640 is an apocalyptic number.

2690910640 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 2690910640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3455850240).

2690910640 is an abundant number, since it is smaller than the sum of its proper divisors (4220789840).

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

2690910640 is a wasteful number, since it uses less digits than its factorization.

2690910640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38810 (or 38804 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 2690910640 is about 51873.9880865160. The cubic root of 2690910640 is about 1390.9123351653.

The spelling of 2690910640 in words is "two billion, six hundred ninety million, nine hundred ten thousand, six hundred forty".