1340736426 has 12 divisors (see below), whose sum is σ = 2904928962. Its totient is φ = 446912136.

The previous prime is 1340736421. The next prime is 1340736491. The reversal of 1340736426 is 6246370431.

It is a happy number.

1340736426 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 7 + 3 + 642 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 951660801 + 389075625 = 30849^2 + 19725^2 .

It is not an unprimeable number, because it can be changed into a prime (1340736421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37242661 + ... + 37242696.

Almost surely, 2^1340736426 is an apocalyptic number.

1340736426 is an abundant number, since it is smaller than the sum of its proper divisors (1564192536).

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

1340736426 is a wasteful number, since it uses less digits than its factorization.

1340736426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74485365 (or 74485362 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 1340736426 is about 36616.0678664436. The cubic root of 1340736426 is about 1102.6756972369.

The spelling of 1340736426 in words is "one billion, three hundred forty million, seven hundred thirty-six thousand, four hundred twenty-six".