1340002664 has 128 divisors (see below), whose sum is σ = 3551385600. Its totient is φ = 456503040.

The previous prime is 1340002663. The next prime is 1340002687. The reversal of 1340002664 is 4662000431.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (1340002663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147749 + ... + 156555.

It is an arithmetic number, because the mean of its divisors is an integer number (27745200).

Almost surely, 2^1340002664 is an apocalyptic number.

1340002664 is a gapful number since it is divisible by the number (14) 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 1340002664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1775692800).

1340002664 is an abundant number, since it is smaller than the sum of its proper divisors (2211382936).

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

1340002664 is a wasteful number, since it uses less digits than its factorization.

1340002664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8863 (or 8859 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1340002664 is about 36606.0468228953. The cubic root of 1340002664 is about 1102.4745020438.

The spelling of 1340002664 in words is "one billion, three hundred forty million, two thousand, six hundred sixty-four".