1320131946 has 16 divisors (see below), whose sum is σ = 3017444544. Its totient is φ = 377180544.

The previous prime is 1320131941. The next prime is 1320131983. The reversal of 1320131946 is 6491310231.

It is a super-3 number, since 3×1320131946³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1320131941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15715815 + ... + 15715898.

It is an arithmetic number, because the mean of its divisors is an integer number (188590284).

Almost surely, 2^1320131946 is an apocalyptic number.

1320131946 is an abundant number, since it is smaller than the sum of its proper divisors (1697312598).

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

1320131946 is a wasteful number, since it uses less digits than its factorization.

1320131946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31431725.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1320131946 is about 36333.6200508565. The cubic root of 1320131946 is about 1096.9978596872.

The spelling of 1320131946 in words is "one billion, three hundred twenty million, one hundred thirty-one thousand, nine hundred forty-six".