1340878877 has 4 divisors (see below), whose sum is σ = 1444023420. Its totient is φ = 1237734336.

The previous prime is 1340878873. The next prime is 1340878879. The reversal of 1340878877 is 7788780431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7788780431 = 241 ⋅32318591.

It can be written as a sum of positive squares in 2 ways, for example, as 243016921 + 1097861956 = 15589^2 + 33134^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340878877 - 2² = 1340878873 is a prime.

It is a super-2 number, since 2×1340878877² = 3595912325569562258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340878873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51572252 + ... + 51572277.

It is an arithmetic number, because the mean of its divisors is an integer number (361005855).

Almost surely, 2^1340878877 is an apocalyptic number.

It is an amenable number.

1340878877 is a deficient number, since it is larger than the sum of its proper divisors (103144543).

1340878877 is a wasteful number, since it uses less digits than its factorization.

1340878877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103144542.

The product of its (nonzero) digits is 2107392, while the sum is 53.

The square root of 1340878877 is about 36618.0130127237. The cubic root of 1340878877 is about 1102.7147483360.

The spelling of 1340878877 in words is "one billion, three hundred forty million, eight hundred seventy-eight thousand, eight hundred seventy-seven".