65212940 has 96 divisors (see below), whose sum is σ = 159371520. Its totient is φ = 22208256.

The previous prime is 65212937. The next prime is 65212951. The reversal of 65212940 is 4921256.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212267 + ... + 212573.

It is an arithmetic number, because the mean of its divisors is an integer number (1660120).

Almost surely, 2^65212940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65212940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79685760).

65212940 is an abundant number, since it is smaller than the sum of its proper divisors (94158580).

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

65212940 is a wasteful number, since it uses less digits than its factorization.

65212940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 65212940 is about 8075.4529284740. The cubic root of 65212940 is about 402.5111605254.

The spelling of 65212940 in words is "sixty-five million, two hundred twelve thousand, nine hundred forty".