65021944 has 32 divisors (see below), whose sum is σ = 135828000. Its totient is φ = 28973952.

The previous prime is 65021921. The next prime is 65021963. The reversal of 65021944 is 44912056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7764 + ... + 13795.

It is an arithmetic number, because the mean of its divisors is an integer number (4244625).

Almost surely, 2^65021944 is an apocalyptic number.

It is an amenable number.

65021944 is an abundant number, since it is smaller than the sum of its proper divisors (70806056).

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

65021944 is a wasteful number, since it uses less digits than its factorization.

65021944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21607 (or 21603 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 65021944 is about 8063.6185425651. The cubic root of 65021944 is about 402.1178173353.

The spelling of 65021944 in words is "sixty-five million, twenty-one thousand, nine hundred forty-four".