1520713866 has 64 divisors (see below), whose sum is σ = 3602497536. Its totient is φ = 418780800.

The previous prime is 1520713829. The next prime is 1520713867. The reversal of 1520713866 is 6683170251.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1520713867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 340206 + ... + 344646.

It is an arithmetic number, because the mean of its divisors is an integer number (56289024).

Almost surely, 2^1520713866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520713866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801248768).

1520713866 is an abundant number, since it is smaller than the sum of its proper divisors (2081783670).

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

1520713866 is a wasteful number, since it uses less digits than its factorization.

1520713866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4747.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1520713866 is about 38996.3314428422. The cubic root of 1520713866 is about 1149.9593850810.

The spelling of 1520713866 in words is "one billion, five hundred twenty million, seven hundred thirteen thousand, eight hundred sixty-six".