65649438 has 24 divisors (see below), whose sum is σ = 142545000. Its totient is φ = 21836304.

The previous prime is 65649407. The next prime is 65649443. The reversal of 65649438 is 83494656.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65649393 and 65649402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5328 + ... + 12636.

It is an arithmetic number, because the mean of its divisors is an integer number (5939375).

Almost surely, 2^65649438 is an apocalyptic number.

65649438 is an abundant number, since it is smaller than the sum of its proper divisors (76895562).

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

65649438 is a wasteful number, since it uses less digits than its factorization.

65649438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7816 (or 7813 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 65649438 is about 8102.4340787198. The cubic root of 65649438 is about 403.4072238248.

The spelling of 65649438 in words is "sixty-five million, six hundred forty-nine thousand, four hundred thirty-eight".