1340723454 has 16 divisors (see below), whose sum is σ = 3064510848. Its totient is φ = 383063832.

The previous prime is 1340723443. The next prime is 1340723471. The reversal of 1340723454 is 4543270431.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15960952 + ... + 15961035.

It is an arithmetic number, because the mean of its divisors is an integer number (191531928).

Almost surely, 2^1340723454 is an apocalyptic number.

1340723454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1340723454 is an abundant number, since it is smaller than the sum of its proper divisors (1723787394).

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

1340723454 is a wasteful number, since it uses less digits than its factorization.

1340723454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31921999.

The product of its (nonzero) digits is 40320, while the sum is 33.

The square root of 1340723454 is about 36615.8907306650. The cubic root of 1340723454 is about 1102.6721409935.

Adding to 1340723454 its reverse (4543270431), we get a palindrome (5883993885).

The spelling of 1340723454 in words is "one billion, three hundred forty million, seven hundred twenty-three thousand, four hundred fifty-four".