1316601920 has 56 divisors (see below), whose sum is σ = 3170453400. Its totient is φ = 520712192.

The previous prime is 1316601911. The next prime is 1316601931. The reversal of 1316601920 is 291066131.

It can be written as a sum of positive squares in 4 ways, for example, as 347151424 + 969450496 = 18632^2 + 31136^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5366 + ... + 51594.

Almost surely, 2^1316601920 is an apocalyptic number.

1316601920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1316601920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585226700).

1316601920 is an abundant number, since it is smaller than the sum of its proper divisors (1853851480).

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

1316601920 is an equidigital number, since it uses as much as digits as its factorization.

1316601920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46335 (or 46325 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1316601920 is about 36285.0095769589. The cubic root of 1316601920 is about 1096.0191979872.

The spelling of 1316601920 in words is "one billion, three hundred sixteen million, six hundred one thousand, nine hundred twenty".