65383920 has 120 divisors (see below), whose sum is σ = 250969056. Its totient is φ = 14943744.

The previous prime is 65383919. The next prime is 65383931. The reversal of 65383920 is 2938356.

It is a tau number, because it is divible by the number of its divisors (120).

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 23 ways as a sum of consecutive naturals, for example, 1447 + ... + 11526.

Almost surely, 2^65383920 is an apocalyptic number.

65383920 is a gapful number since it is divisible by the number (60) 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 65383920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125484528).

65383920 is an abundant number, since it is smaller than the sum of its proper divisors (185585136).

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

65383920 is a wasteful number, since it uses less digits than its factorization.

65383920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12999 (or 12990 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 65383920 is about 8086.0324016170. The cubic root of 65383920 is about 402.8626311525.

The spelling of 65383920 in words is "sixty-five million, three hundred eighty-three thousand, nine hundred twenty".