1315802840 has 64 divisors (see below), whose sum is σ = 3241416960. Its totient is φ = 476737920.

The previous prime is 1315802821. The next prime is 1315802867. The reversal of 1315802840 is 482085131.

It is a super-2 number, since 2×1315802840² = 3462674227504131200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1315802797 and 1315802806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119237 + ... + 129803.

It is an arithmetic number, because the mean of its divisors is an integer number (50647140).

Almost surely, 2^1315802840 is an apocalyptic number.

1315802840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1315802840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620708480).

1315802840 is an abundant number, since it is smaller than the sum of its proper divisors (1925614120).

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

1315802840 is a wasteful number, since it uses less digits than its factorization.

1315802840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10872 (or 10868 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1315802840 is about 36273.9967469812. The cubic root of 1315802840 is about 1095.7974189132.

Adding to 1315802840 its reverse (482085131), we get a palindrome (1797887971).

The spelling of 1315802840 in words is "one billion, three hundred fifteen million, eight hundred two thousand, eight hundred forty".