65138922 has 48 divisors (see below), whose sum is σ = 144934920. Its totient is φ = 21136896.

The previous prime is 65138893. The next prime is 65138923. The reversal of 65138922 is 22983156.

It can be written as a sum of positive squares in 4 ways, for example, as 33767721 + 31371201 = 5811^2 + 5601^2 .

It is not an unprimeable number, because it can be changed into a prime (65138923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116668 + ... + 117224.

Almost surely, 2^65138922 is an apocalyptic number.

65138922 is an abundant number, since it is smaller than the sum of its proper divisors (79795998).

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

65138922 is a wasteful number, since it uses less digits than its factorization.

65138922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 724 counting only the distinct ones).

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

The square root of 65138922 is about 8070.8687264755. The cubic root of 65138922 is about 402.3588167824.

The spelling of 65138922 in words is "sixty-five million, one hundred thirty-eight thousand, nine hundred twenty-two".