65798388 has 18 divisors (see below), whose sum is σ = 166323794. Its totient is φ = 21932784.

The previous prime is 65798371. The next prime is 65798413. The reversal of 65798388 is 88389756.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47032164 + 18766224 = 6858^2 + 4332^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 913831 + ... + 913902.

Almost surely, 2^65798388 is an apocalyptic number.

It is an amenable number.

65798388 is an abundant number, since it is smaller than the sum of its proper divisors (100525406).

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

65798388 is a wasteful number, since it uses less digits than its factorization.

65798388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827743 (or 1827738 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 65798388 is about 8111.6205532557. The cubic root of 65798388 is about 403.7120861432.

The spelling of 65798388 in words is "sixty-five million, seven hundred ninety-eight thousand, three hundred eighty-eight".