1343777640 has 64 divisors (see below), whose sum is σ = 4170355200. Its totient is φ = 345983232.

The previous prime is 1343777627. The next prime is 1343777651. The reversal of 1343777640 is 467773431.

It is a junction number, because it is equal to n+sod(n) for n = 1343777592 and 1343777601.

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, 189592 + ... + 196551.

It is an arithmetic number, because the mean of its divisors is an integer number (65161800).

Almost surely, 2^1343777640 is an apocalyptic number.

1343777640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1343777640 is an abundant number, since it is smaller than the sum of its proper divisors (2826577560).

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

1343777640 is a wasteful number, since it uses less digits than its factorization.

1343777640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386186 (or 386182 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 42.

The square root of 1343777640 is about 36657.5727510701. The cubic root of 1343777640 is about 1103.5088066422.

The spelling of 1343777640 in words is "one billion, three hundred forty-three million, seven hundred seventy-seven thousand, six hundred forty".