965581820 has 48 divisors (see below), whose sum is σ = 2320109568. Its totient is φ = 330669120.

The previous prime is 965581819. The next prime is 965581847. The reversal of 965581820 is 28185569.

It is a super-2 number, since 2×965581820² = 1864696502229024800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132389 + ... + 139491.

It is an arithmetic number, because the mean of its divisors is an integer number (48335616).

Almost surely, 2^965581820 is an apocalyptic number.

It is an amenable number.

965581820 is an abundant number, since it is smaller than the sum of its proper divisors (1354527748).

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

965581820 is a wasteful number, since it uses less digits than its factorization.

965581820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8090 (or 8088 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 965581820 is about 31073.8124471395. The cubic root of 965581820 is about 988.3930738294.

The spelling of 965581820 in words is "nine hundred sixty-five million, five hundred eighty-one thousand, eight hundred twenty".