65841930 has 128 divisors (see below), whose sum is σ = 218972160. Its totient is φ = 13677120.

The previous prime is 65841929. The next prime is 65841943. The reversal of 65841930 is 3914856.

It is a super-2 number, since 2×65841930² = 8670319492249800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19207 + ... + 22373.

It is an arithmetic number, because the mean of its divisors is an integer number (1710720).

Almost surely, 2^65841930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65841930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109486080).

65841930 is an abundant number, since it is smaller than the sum of its proper divisors (153130230).

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

65841930 is a wasteful number, since it uses less digits than its factorization.

65841930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201 (or 3195 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 65841930 is about 8114.3040366996. The cubic root of 65841930 is about 403.8011184945.

The spelling of 65841930 in words is "sixty-five million, eight hundred forty-one thousand, nine hundred thirty".