65958438 has 64 divisors (see below), whose sum is σ = 164021760. Its totient is φ = 17217792.

The previous prime is 65958413. The next prime is 65958449. The reversal of 65958438 is 83485956.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57858 + ... + 58986.

It is an arithmetic number, because the mean of its divisors is an integer number (2562840).

Almost surely, 2^65958438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65958438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82010880).

65958438 is an abundant number, since it is smaller than the sum of its proper divisors (98063322).

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

65958438 is a wasteful number, since it uses less digits than its factorization.

65958438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261.

The product of its digits is 1036800, while the sum is 48.

The square root of 65958438 is about 8121.4800375301. The cubic root of 65958438 is about 404.0391549477.

The spelling of 65958438 in words is "sixty-five million, nine hundred fifty-eight thousand, four hundred thirty-eight".