1340401023 has 36 divisors (see below), whose sum is σ = 2219892480. Its totient is φ = 776325888.

The previous prime is 1340401021. The next prime is 1340401043. The reversal of 1340401023 is 3201040431.

It is not a de Polignac number, because 1340401023 - 2¹ = 1340401021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340400987 and 1340401005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340401021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 63 + ... + 51776.

It is an arithmetic number, because the mean of its divisors is an integer number (61663680).

Almost surely, 2^1340401023 is an apocalyptic number.

1340401023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1340401023 is a deficient number, since it is larger than the sum of its proper divisors (879491457).

1340401023 is a wasteful number, since it uses less digits than its factorization.

1340401023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51888 (or 51872 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1340401023 is about 36611.4875824515. The cubic root of 1340401023 is about 1102.5837399180.

Adding to 1340401023 its reverse (3201040431), we get a palindrome (4541441454).

The spelling of 1340401023 in words is "one billion, three hundred forty million, four hundred one thousand, twenty-three".