1306690920 has 192 divisors, whose sum is σ = 4504248000. Its totient is φ = 336942720.

The previous prime is 1306690897. The next prime is 1306690939. The reversal of 1306690920 is 290966031.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1037251 + ... + 1038509.

It is an arithmetic number, because the mean of its divisors is an integer number (23459625).

Almost surely, 2^1306690920 is an apocalyptic number.

1306690920 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 1306690920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2252124000).

1306690920 is an abundant number, since it is smaller than the sum of its proper divisors (3197557080).

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

1306690920 is a wasteful number, since it uses less digits than its factorization.

1306690920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 1306690920 is about 36148.1800371748. The cubic root of 1306690920 is about 1093.2620958774.

The spelling of 1306690920 in words is "one billion, three hundred six million, six hundred ninety thousand, nine hundred twenty".