2640890088 has 64 divisors (see below), whose sum is σ = 7359580800. Its totient is φ = 877443840.

The previous prime is 2640890033. The next prime is 2640890101. The reversal of 2640890088 is 8800980462.

It is a happy number.

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, 47520 + ... + 86832.

It is an arithmetic number, because the mean of its divisors is an integer number (114993450).

Almost surely, 2^2640890088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2640890088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3679790400).

2640890088 is an abundant number, since it is smaller than the sum of its proper divisors (4718690712).

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

2640890088 is a wasteful number, since it uses less digits than its factorization.

2640890088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39639 (or 39629 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 2640890088 is about 51389.5912418069. The cubic root of 2640890088 is about 1382.2399539228.

The spelling of 2640890088 in words is "two billion, six hundred forty million, eight hundred ninety thousand, eighty-eight".