1340402415 has 64 divisors (see below), whose sum is σ = 2397150720. Its totient is φ = 634083840.

The previous prime is 1340402363. The next prime is 1340402419. The reversal of 1340402415 is 5142040431.

It is not a de Polignac number, because 1340402415 - 2¹⁸ = 1340140271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340402419) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1527957 + ... + 1528833.

It is an arithmetic number, because the mean of its divisors is an integer number (37455480).

Almost surely, 2^1340402415 is an apocalyptic number.

1340402415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1340402415 is a deficient number, since it is larger than the sum of its proper divisors (1056748305).

1340402415 is a wasteful number, since it uses less digits than its factorization.

1340402415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1340402415 is about 36611.5065928732. The cubic root of 1340402415 is about 1102.5841215938.

Adding to 1340402415 its reverse (5142040431), we get a palindrome (6482442846).

The spelling of 1340402415 in words is "one billion, three hundred forty million, four hundred two thousand, four hundred fifteen".