1340779545 has 192 divisors, whose sum is σ = 2960395776. Its totient is φ = 547430400.

The previous prime is 1340779519. The next prime is 1340779607. The reversal of 1340779545 is 5459770431.

1340779545 is a `hidden beast` number, since 1 + 34 + 0 + 7 + 79 + 545 = 666.

It is not a de Polignac number, because 1340779545 - 2¹⁰ = 1340778521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1340779545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13274995 + ... + 13275095.

It is an arithmetic number, because the mean of its divisors is an integer number (15418728).

Almost surely, 2^1340779545 is an apocalyptic number.

1340779545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1340779545 is an abundant number, since it is smaller than the sum of its proper divisors (1619616231).

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

1340779545 is a wasteful number, since it uses less digits than its factorization.

1340779545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 1340779545 is about 36616.6566605964. The cubic root of 1340779545 is about 1102.6875180449.

The spelling of 1340779545 in words is "one billion, three hundred forty million, seven hundred seventy-nine thousand, five hundred forty-five".