1320040136 has 8 divisors (see below), whose sum is σ = 2475075270. Its totient is φ = 660020064.

The previous prime is 1320040133. The next prime is 1320040177. The reversal of 1320040136 is 6310400231.

It can be written as a sum of positive squares in only one way, i.e., 749116900 + 570923236 = 27370^2 + 23894^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1320040133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82502501 + ... + 82502516.

Almost surely, 2^1320040136 is an apocalyptic number.

It is an amenable number.

1320040136 is a deficient number, since it is larger than the sum of its proper divisors (1155035134).

1320040136 is a wasteful number, since it uses less digits than its factorization.

1320040136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165005023 (or 165005019 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1320040136 is about 36332.3565984922. The cubic root of 1320040136 is about 1096.9724284645.

Adding to 1320040136 its reverse (6310400231), we get a palindrome (7630440367).

The spelling of 1320040136 in words is "one billion, three hundred twenty million, forty thousand, one hundred thirty-six".