1340534220 has 48 divisors (see below), whose sum is σ = 3756624480. Its totient is φ = 357177856.

The previous prime is 1340534183. The next prime is 1340534263. The reversal of 1340534220 is 224350431.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68674 + ... + 86006.

It is an arithmetic number, because the mean of its divisors is an integer number (78263010).

Almost surely, 2^1340534220 is an apocalyptic number.

1340534220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340534220 is an abundant number, since it is smaller than the sum of its proper divisors (2416090260).

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

1340534220 is a wasteful number, since it uses less digits than its factorization.

1340534220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18634 (or 18632 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1340534220 is about 36613.3065974654. The cubic root of 1340534220 is about 1102.6202603273.

Adding to 1340534220 its reverse (224350431), we get a palindrome (1564884651).

The spelling of 1340534220 in words is "one billion, three hundred forty million, five hundred thirty-four thousand, two hundred twenty".