1318794480 has 80 divisors (see below), whose sum is σ = 4542521760. Its totient is φ = 351677952.

The previous prime is 1318794473. The next prime is 1318794481. The reversal of 1318794480 is 844978131.

It is a happy number.

1318794480 is a `hidden beast` number, since 1 + 3 + 1 + 87 + 94 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318794481) 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, 303117 + ... + 307436.

It is an arithmetic number, because the mean of its divisors is an integer number (56781522).

Almost surely, 2^1318794480 is an apocalyptic number.

1318794480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1318794480 is an abundant number, since it is smaller than the sum of its proper divisors (3223727280).

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

1318794480 is a wasteful number, since it uses less digits than its factorization.

1318794480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610575 (or 610563 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1318794480 is about 36315.2100365673. The cubic root of 1318794480 is about 1096.6272671591.

The spelling of 1318794480 in words is "one billion, three hundred eighteen million, seven hundred ninety-four thousand, four hundred eighty".