1369156640 has 24 divisors (see below), whose sum is σ = 3234632940. Its totient is φ = 547662592.

The previous prime is 1369156639. The next prime is 1369156643. The reversal of 1369156640 is 466519631.

It can be written as a sum of positive squares in 2 ways, for example, as 1214104336 + 155052304 = 34844^2 + 12452^2 .

It is not an unprimeable number, because it can be changed into a prime (1369156643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4278455 + ... + 4278774.

Almost surely, 2^1369156640 is an apocalyptic number.

1369156640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1369156640 is an abundant number, since it is smaller than the sum of its proper divisors (1865476300).

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

1369156640 is an equidigital number, since it uses as much as digits as its factorization.

1369156640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8557244 (or 8557236 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 1369156640 is about 37002.1166962108. The cubic root of 1369156640 is about 1110.4125944999.

The spelling of 1369156640 in words is "one billion, three hundred sixty-nine million, one hundred fifty-six thousand, six hundred forty".