1340400444 has 24 divisors (see below), whose sum is σ = 3228492288. Its totient is φ = 432387120.

The previous prime is 1340400421. The next prime is 1340400487. The reversal of 1340400444 is 4440040431.

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, 1801242 + ... + 1801985.

It is an arithmetic number, because the mean of its divisors is an integer number (134520512).

Almost surely, 2^1340400444 is an apocalyptic number.

It is an amenable number.

1340400444 is an abundant number, since it is smaller than the sum of its proper divisors (1888091844).

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

1340400444 is a wasteful number, since it uses less digits than its factorization.

1340400444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603265 (or 3603263 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1340400444 is about 36611.4796750964. The cubic root of 1340400444 is about 1102.5835811605.

Adding to 1340400444 its reverse (4440040431), we get a palindrome (5780440875).

The spelling of 1340400444 in words is "one billion, three hundred forty million, four hundred thousand, four hundred forty-four".