65122380 has 120 divisors (see below), whose sum is σ = 207955440. Its totient is φ = 17055360.

The previous prime is 65122357. The next prime is 65122399. The reversal of 65122380 is 8322156.

65122380 is a `hidden beast` number, since 651 + 2 + 2 + 3 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 98491 + ... + 99149.

It is an arithmetic number, because the mean of its divisors is an integer number (1732962).

Almost surely, 2^65122380 is an apocalyptic number.

65122380 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 65122380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103977720).

65122380 is an abundant number, since it is smaller than the sum of its proper divisors (142833060).

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

65122380 is a wasteful number, since it uses less digits than its factorization.

65122380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 65122380 is about 8069.8438646606. The cubic root of 65122380 is about 402.3247542853.

The spelling of 65122380 in words is "sixty-five million, one hundred twenty-two thousand, three hundred eighty".