1340702280 has 320 divisors, whose sum is σ = 4838557680. Its totient is φ = 331776000.

The previous prime is 1340702239. The next prime is 1340702299. The reversal of 1340702280 is 822070431.

It can be written as a sum of positive squares in 8 ways, for example, as 1235803716 + 104898564 = 35154^2 + 10242^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5562960 + ... + 5563200.

Almost surely, 2^1340702280 is an apocalyptic number.

1340702280 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 1340702280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419278840).

1340702280 is an abundant number, since it is smaller than the sum of its proper divisors (3497855400).

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

1340702280 is a wasteful number, since it uses less digits than its factorization.

1340702280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1340702280 is about 36615.6015927637. The cubic root of 1340702280 is about 1102.6663361417. Note that the first 3 decimals are identical.

The spelling of 1340702280 in words is "one billion, three hundred forty million, seven hundred two thousand, two hundred eighty".