65064438 has 32 divisors (see below), whose sum is σ = 144865920. Its totient is φ = 21646440.

The previous prime is 65064431. The next prime is 65064449. The reversal of 65064438 is 83446056.

65064438 is a `hidden beast` number, since 6 + 5 + 0 + 644 + 3 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65064431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41733 + ... + 43263.

It is an arithmetic number, because the mean of its divisors is an integer number (4527060).

Almost surely, 2^65064438 is an apocalyptic number.

65064438 is an abundant number, since it is smaller than the sum of its proper divisors (79801482).

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

65064438 is a wasteful number, since it uses less digits than its factorization.

65064438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2323 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 65064438 is about 8066.2530334722. The cubic root of 65064438 is about 402.2053973757.

The spelling of 65064438 in words is "sixty-five million, sixty-four thousand, four hundred thirty-eight".