1316489440 has 48 divisors (see below), whose sum is σ = 3554524512. Its totient is φ = 451367424.

The previous prime is 1316489429. The next prime is 1316489441. The reversal of 1316489440 is 449846131.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1316489393 and 1316489402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316489441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586599 + ... + 588838.

It is an arithmetic number, because the mean of its divisors is an integer number (74052594).

Almost surely, 2^1316489440 is an apocalyptic number.

1316489440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1316489440 is an abundant number, since it is smaller than the sum of its proper divisors (2238035072).

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

1316489440 is a wasteful number, since it uses less digits than its factorization.

1316489440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175459 (or 1175451 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1316489440 is about 36283.4595924920. The cubic root of 1316489440 is about 1095.9879853763.

The spelling of 1316489440 in words is "one billion, three hundred sixteen million, four hundred eighty-nine thousand, four hundred forty".