2709399840 has 96 divisors (see below), whose sum is σ = 9753851520. Its totient is φ = 619290624.

The previous prime is 2709399827. The next prime is 2709399877. The reversal of 2709399840 is 489939072.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 399825 + ... + 406544.

It is an arithmetic number, because the mean of its divisors is an integer number (101602620).

Almost surely, 2^2709399840 is an apocalyptic number.

2709399840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2709399840 is an abundant number, since it is smaller than the sum of its proper divisors (7044451680).

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

2709399840 is a wasteful number, since it uses less digits than its factorization.

2709399840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806394 (or 806386 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 2709399840 is about 52051.8956427141. The cubic root of 2709399840 is about 1394.0907115052.

The spelling of 2709399840 in words is "two billion, seven hundred nine million, three hundred ninety-nine thousand, eight hundred forty".