1340006400 has 252 divisors, whose sum is σ = 4806510072. Its totient is φ = 356843520.

The previous prime is 1340006389. The next prime is 1340006401. The reversal of 1340006400 is 46000431.

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 (1340006401) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1842837 + ... + 1843563.

Almost surely, 2^1340006400 is an apocalyptic number.

1340006400 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 1340006400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2403255036).

1340006400 is an abundant number, since it is smaller than the sum of its proper divisors (3466503672).

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

1340006400 is an equidigital number, since it uses as much as digits as its factorization.

1340006400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 737 counting only the distinct ones).

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

The square root of 1340006400 is about 36606.0978526802. The cubic root of 1340006400 is about 1102.4755266291.

Adding to 1340006400 its reverse (46000431), we get a palindrome (1386006831).

The spelling of 1340006400 in words is "one billion, three hundred forty million, six thousand, four hundred".