1340640288 has 96 divisors (see below), whose sum is σ = 4211020800. Its totient is φ = 412501248.

The previous prime is 1340640271. The next prime is 1340640299. The reversal of 1340640288 is 8820460431.

1340640288 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 640 + 2 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48448 + ... + 70911.

It is an arithmetic number, because the mean of its divisors is an integer number (43864800).

Almost surely, 2^1340640288 is an apocalyptic number.

1340640288 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1340640288 is an abundant number, since it is smaller than the sum of its proper divisors (2870380512).

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

1340640288 is a wasteful number, since it uses less digits than its factorization.

1340640288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119391 (or 119377 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 1340640288 is about 36614.7550585826. The cubic root of 1340640288 is about 1102.6493406844.

The spelling of 1340640288 in words is "one billion, three hundred forty million, six hundred forty thousand, two hundred eighty-eight".