1361665340 has 48 divisors (see below), whose sum is σ = 3273177600. Its totient is φ = 466116672.

The previous prime is 1361665313. The next prime is 1361665367. The reversal of 1361665340 is 435661631.

It is an interprime number because it is at equal distance from previous prime (1361665313) and next prime (1361665367).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1361665340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84881 + ... + 99639.

It is an arithmetic number, because the mean of its divisors is an integer number (68191200).

Almost surely, 2^1361665340 is an apocalyptic number.

1361665340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1361665340 is an abundant number, since it is smaller than the sum of its proper divisors (1911512260).

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

1361665340 is a wasteful number, since it uses less digits than its factorization.

1361665340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15434 (or 15432 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 1361665340 is about 36900.7498568796. The cubic root of 1361665340 is about 1108.3836930905.

The spelling of 1361665340 in words is "one billion, three hundred sixty-one million, six hundred sixty-five thousand, three hundred forty".