1340693280 has 144 divisors (see below), whose sum is σ = 4611769344. Its totient is φ = 354654720.

The previous prime is 1340693267. The next prime is 1340693281. The reversal of 1340693280 is 823960431.

1340693280 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1340693281) 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, 179215 + ... + 186545.

It is an arithmetic number, because the mean of its divisors is an integer number (32026176).

Almost surely, 2^1340693280 is an apocalyptic number.

1340693280 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 1340693280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2305884672).

1340693280 is an abundant number, since it is smaller than the sum of its proper divisors (3271076064).

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

1340693280 is a wasteful number, since it uses less digits than its factorization.

1340693280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7479 (or 7468 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1340693280 is about 36615.4786941261. The cubic root of 1340693280 is about 1102.6638687733.

The spelling of 1340693280 in words is "one billion, three hundred forty million, six hundred ninety-three thousand, two hundred eighty".