1320600040 has 32 divisors (see below), whose sum is σ = 2973600000. Its totient is φ = 527840064.

The previous prime is 1320599981. The next prime is 1320600049. The reversal of 1320600040 is 400060231.

It is a junction number, because it is equal to n+sod(n) for n = 1320599987 and 1320600023.

It is not an unprimeable number, because it can be changed into a prime (1320600049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44161 + ... + 67759.

It is an arithmetic number, because the mean of its divisors is an integer number (92925000).

Almost surely, 2^1320600040 is an apocalyptic number.

1320600040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320600040 is an abundant number, since it is smaller than the sum of its proper divisors (1652999960).

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

1320600040 is a wasteful number, since it uses less digits than its factorization.

1320600040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25009 (or 25005 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1320600040 is about 36340.0610896570. The cubic root of 1320600040 is about 1097.1275026463.

Adding to 1320600040 its reverse (400060231), we get a palindrome (1720660271).

The spelling of 1320600040 in words is "one billion, three hundred twenty million, six hundred thousand, forty".