1349307920 has 40 divisors (see below), whose sum is σ = 3196342296. Its totient is φ = 529538048.

The previous prime is 1349307919. The next prime is 1349307941. The reversal of 1349307920 is 297039431.

It can be written as a sum of positive squares in 4 ways, for example, as 120384784 + 1228923136 = 10972^2 + 35056^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 154877 + ... + 163356.

Almost surely, 2^1349307920 is an apocalyptic number.

1349307920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1349307920 is an abundant number, since it is smaller than the sum of its proper divisors (1847034376).

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

1349307920 is a wasteful number, since it uses less digits than its factorization.

1349307920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318299 (or 318293 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 1349307920 is about 36732.9269185019. The cubic root of 1349307920 is about 1105.0205547523.

The spelling of 1349307920 in words is "one billion, three hundred forty-nine million, three hundred seven thousand, nine hundred twenty".