1340920660 has 24 divisors (see below), whose sum is σ = 2816684640. Its totient is φ = 536225184.

The previous prime is 1340920639. The next prime is 1340920681. The reversal of 1340920660 is 660290431.

It is an interprime number because it is at equal distance from previous prime (1340920639) and next prime (1340920681).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100671 + ... + 113209.

It is an arithmetic number, because the mean of its divisors is an integer number (117361860).

Almost surely, 2^1340920660 is an apocalyptic number.

1340920660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340920660 is an abundant number, since it is smaller than the sum of its proper divisors (1475763980).

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

1340920660 is a wasteful number, since it uses less digits than its factorization.

1340920660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17895 (or 17893 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1340920660 is about 36618.5835335011. The cubic root of 1340920660 is about 1102.7262020804.

The spelling of 1340920660 in words is "one billion, three hundred forty million, nine hundred twenty thousand, six hundred sixty".