1340618739 has 16 divisors (see below), whose sum is σ = 1904246400. Its totient is φ = 836502336.

The previous prime is 1340618737. The next prime is 1340618749. The reversal of 1340618739 is 9378160431.

It is not a de Polignac number, because 1340618739 - 2¹ = 1340618737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1340618739.

It is not an unprimeable number, because it can be changed into a prime (1340618737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136954 + ... + 146415.

It is an arithmetic number, because the mean of its divisors is an integer number (119015400).

Almost surely, 2^1340618739 is an apocalyptic number.

1340618739 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1340618739 is a deficient number, since it is larger than the sum of its proper divisors (563627661).

1340618739 is a wasteful number, since it uses less digits than its factorization.

1340618739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283474.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1340618739 is about 36614.4607907859. The cubic root of 1340618739 is about 1102.6434327815.

The spelling of 1340618739 in words is "one billion, three hundred forty million, six hundred eighteen thousand, seven hundred thirty-nine".