1340389494 has 48 divisors (see below), whose sum is σ = 2965248000. Its totient is φ = 437462448.

The previous prime is 1340389403. The next prime is 1340389499. The reversal of 1340389494 is 4949830431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340389499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276907 + ... + 281705.

It is an arithmetic number, because the mean of its divisors is an integer number (61776000).

Almost surely, 2^1340389494 is an apocalyptic number.

1340389494 is an abundant number, since it is smaller than the sum of its proper divisors (1624858506).

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

1340389494 is a wasteful number, since it uses less digits than its factorization.

1340389494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129 (or 5126 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1340389494 is about 36611.3301315317. The cubic root of 1340389494 is about 1102.5805787435.

The spelling of 1340389494 in words is "one billion, three hundred forty million, three hundred eighty-nine thousand, four hundred ninety-four".