1340781470 has 16 divisors (see below), whose sum is σ = 2758179168. Its totient is φ = 459696480.

The previous prime is 1340781457. The next prime is 1340781473. The reversal of 1340781470 is 741870431.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340781470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340781473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9576941 + ... + 9577080.

It is an arithmetic number, because the mean of its divisors is an integer number (172386198).

Almost surely, 2^1340781470 is an apocalyptic number.

1340781470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1340781470 is an abundant number, since it is smaller than the sum of its proper divisors (1417397698).

1340781470 is a wasteful number, since it uses less digits than its factorization.

1340781470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19154035.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 1340781470 is about 36616.6829464385. The cubic root of 1340781470 is about 1102.6880457659.

The spelling of 1340781470 in words is "one billion, three hundred forty million, seven hundred eighty-one thousand, four hundred seventy".