1340423100 has 72 divisors (see below), whose sum is σ = 4309220720. Its totient is φ = 357445440.

The previous prime is 1340423059. The next prime is 1340423107. The reversal of 1340423100 is 13240431.

It is a super-2 number, since 2×1340423100² = 3593468174027220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340423107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245527 + ... + 250926.

Almost surely, 2^1340423100 is an apocalyptic number.

1340423100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340423100 is an abundant number, since it is smaller than the sum of its proper divisors (2968797620).

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

1340423100 is a wasteful number, since it uses less digits than its factorization.

1340423100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496476 (or 496463 counting only the distinct ones).

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

The square root of 1340423100 is about 36611.7890849382. The cubic root of 1340423100 is about 1102.5897932327.

Adding to 1340423100 its reverse (13240431), we get a palindrome (1353663531).

The spelling of 1340423100 in words is "one billion, three hundred forty million, four hundred twenty-three thousand, one hundred".