1340219881 has 16 divisors (see below), whose sum is σ = 1799457408. Its totient is φ = 963993600.

The previous prime is 1340219873. The next prime is 1340219893. The reversal of 1340219881 is 1889120431.

It is a cyclic number.

It is not a de Polignac number, because 1340219881 - 2³ = 1340219873 is a prime.

It is a super-2 number, since 2×1340219881² = 3592378658855308322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1340219881.

It is not an unprimeable number, because it can be changed into a prime (1340219801) 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, 668440 + ... + 670441.

It is an arithmetic number, because the mean of its divisors is an integer number (112466088).

Almost surely, 2^1340219881 is an apocalyptic number.

1340219881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1340219881 is a deficient number, since it is larger than the sum of its proper divisors (459237527).

1340219881 is a wasteful number, since it uses less digits than its factorization.

1340219881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338912.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1340219881 is about 36609.0136578412. The cubic root of 1340219881 is about 1102.5340699018.

The spelling of 1340219881 in words is "one billion, three hundred forty million, two hundred nineteen thousand, eight hundred eighty-one".