1308920 has 32 divisors (see below), whose sum is σ = 3017520. Its totient is φ = 510720.

The previous prime is 1308919. The next prime is 1308943. The reversal of 1308920 is 298031.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1340 + ... + 2100.

2^1308920 is an apocalyptic number.

1308920 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 1308920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508760).

1308920 is an abundant number, since it is smaller than the sum of its proper divisors (1708600).

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

1308920 is a wasteful number, since it uses less digits than its factorization.

1308920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1308920 is about 1144.0804167540. The cubic root of 1308920 is about 109.3883406857.

The spelling of 1308920 in words is "one million, three hundred eight thousand, nine hundred twenty".