1340664 has 32 divisors (see below), whose sum is σ = 3610320. Its totient is φ = 412416.

The previous prime is 1340653. The next prime is 1340681. The reversal of 1340664 is 4660431.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837 + ... + 2460.

2^1340664 is an apocalyptic number.

It is an amenable number.

1340664 is an abundant number, since it is smaller than the sum of its proper divisors (2269656).

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

1340664 is a wasteful number, since it uses less digits than its factorization.

1340664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319 (or 4315 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1340664 is about 1157.8704590756. The cubic root of 1340664 is about 110.2655841525.

The spelling of 1340664 in words is "one million, three hundred forty thousand, six hundred sixty-four".