1340556140 has 48 divisors (see below), whose sum is σ = 3509823744. Its totient is φ = 417835200.

The previous prime is 1340556121. The next prime is 1340556149. The reversal of 1340556140 is 416550431.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1340556149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433706 + ... + 436785.

It is an arithmetic number, because the mean of its divisors is an integer number (73121328).

Almost surely, 2^1340556140 is an apocalyptic number.

1340556140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340556140 is an abundant number, since it is smaller than the sum of its proper divisors (2169267604).

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

1340556140 is a wasteful number, since it uses less digits than its factorization.

1340556140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870518 (or 870516 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1340556140 is about 36613.6059409613. The cubic root of 1340556140 is about 1102.6262701961.

The spelling of 1340556140 in words is "one billion, three hundred forty million, five hundred fifty-six thousand, one hundred forty".