2865399240 has 64 divisors (see below), whose sum is σ = 9377674560. Its totient is φ = 694641920.

The previous prime is 2865399221. The next prime is 2865399241. The reversal of 2865399240 is 429935682.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2865399240.

It is not an unprimeable number, because it can be changed into a prime (2865399241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084059 + ... + 1086698.

It is an arithmetic number, because the mean of its divisors is an integer number (146526165).

Almost surely, 2^2865399240 is an apocalyptic number.

2865399240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2865399240 is an abundant number, since it is smaller than the sum of its proper divisors (6512275320).

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

2865399240 is a wasteful number, since it uses less digits than its factorization.

2865399240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170782 (or 2170778 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 2865399240 is about 53529.4240581757. The cubic root of 2865399240 is about 1420.3489256937.

The spelling of 2865399240 in words is "two billion, eight hundred sixty-five million, three hundred ninety-nine thousand, two hundred forty".