65089920 has 256 divisors, whose sum is σ = 246758400. Its totient is φ = 14278656.

The previous prime is 65089903. The next prime is 65089943. The reversal of 65089920 is 2998056.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389677 + ... + 389843.

It is an arithmetic number, because the mean of its divisors is an integer number (963900).

Almost surely, 2^65089920 is an apocalyptic number.

65089920 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 65089920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123379200).

65089920 is an abundant number, since it is smaller than the sum of its proper divisors (181668480).

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

65089920 is a wasteful number, since it uses less digits than its factorization.

65089920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 65089920 is about 8067.8324226523. The cubic root of 65089920 is about 402.2578974334.

The spelling of 65089920 in words is "sixty-five million, eighty-nine thousand, nine hundred twenty".