65229138 has 80 divisors (see below), whose sum is σ = 160997760. Its totient is φ = 19613664.

The previous prime is 65229107. The next prime is 65229169. The reversal of 65229138 is 83192256.

65229138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65229107) and next prime (65229169).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 98653 + ... + 99311.

It is an arithmetic number, because the mean of its divisors is an integer number (2012472).

Almost surely, 2^65229138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65229138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80498880).

65229138 is an abundant number, since it is smaller than the sum of its proper divisors (95768622).

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

65229138 is a wasteful number, since it uses less digits than its factorization.

65229138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 724 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 65229138 is about 8076.4557820866. The cubic root of 65229138 is about 402.5444838507.

The spelling of 65229138 in words is "sixty-five million, two hundred twenty-nine thousand, one hundred thirty-eight".