65490138 has 48 divisors (see below), whose sum is σ = 162616896. Its totient is φ = 18659520.

The previous prime is 65490127. The next prime is 65490157. The reversal of 65490138 is 83109456.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85678 + ... + 86438.

It is an arithmetic number, because the mean of its divisors is an integer number (3387852).

Almost surely, 2^65490138 is an apocalyptic number.

65490138 is an abundant number, since it is smaller than the sum of its proper divisors (97126758).

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

65490138 is a wasteful number, since it uses less digits than its factorization.

65490138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459 (or 1456 counting only the distinct ones).

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

The square root of 65490138 is about 8092.5977287889. The cubic root of 65490138 is about 403.0806669834.

The spelling of 65490138 in words is "sixty-five million, four hundred ninety thousand, one hundred thirty-eight".