1340244400 has 90 divisors (see below), whose sum is σ = 3539397596. Its totient is φ = 487344000.

The previous prime is 1340244397. The next prime is 1340244457. The reversal of 1340244400 is 44420431.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34555 + ... + 62245.

Almost surely, 2^1340244400 is an apocalyptic number.

1340244400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340244400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769698798).

1340244400 is an abundant number, since it is smaller than the sum of its proper divisors (2199153196).

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

1340244400 is a wasteful number, since it uses less digits than its factorization.

1340244400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27731 (or 27709 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1340244400 is about 36609.3485328543. The cubic root of 1340244400 is about 1102.5407933926.

Adding to 1340244400 its reverse (44420431), we get a palindrome (1384664831).

The spelling of 1340244400 in words is "one billion, three hundred forty million, two hundred forty-four thousand, four hundred".