2678595990 has 128 divisors (see below), whose sum is σ = 7960550400. Its totient is φ = 562802688.

The previous prime is 2678595977. The next prime is 2678596001. The reversal of 2678595990 is 995958762.

It is a happy number.

It is a congruent number.

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, 144786 + ... + 162234.

It is an arithmetic number, because the mean of its divisors is an integer number (62191800).

Almost surely, 2^2678595990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2678595990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3980275200).

2678595990 is an abundant number, since it is smaller than the sum of its proper divisors (5281954410).

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

2678595990 is a wasteful number, since it uses less digits than its factorization.

2678595990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17526.

The product of its (nonzero) digits is 12247200, while the sum is 60.

The square root of 2678595990 is about 51755.1542360758. The cubic root of 2678595990 is about 1388.7873055683.

The spelling of 2678595990 in words is "two billion, six hundred seventy-eight million, five hundred ninety-five thousand, nine hundred ninety".