2815012840 has 24 divisors (see below), whose sum is σ = 6334533990. Its totient is φ = 1125870912.

The previous prime is 2815012801. The next prime is 2815012853. The reversal of 2815012840 is 482105182.

It can be written as a sum of positive squares in 3 ways, for example, as 2807516196 + 7496644 = 52986^2 + 2738^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331366 + ... + 339754.

Almost surely, 2^2815012840 is an apocalyptic number.

2815012840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2815012840 is an abundant number, since it is smaller than the sum of its proper divisors (3519521150).

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

2815012840 is an frugal number, since it uses more digits than its factorization.

2815012840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16789 (or 8396 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 2815012840 is about 53056.6945823051. The cubic root of 2815012840 is about 1411.9743044916.

It can be divided in two parts, 281 and 5012840, that added together give a square (5013121 = 2239²).

The spelling of 2815012840 in words is "two billion, eight hundred fifteen million, twelve thousand, eight hundred forty".