65249388 has 36 divisors (see below), whose sum is σ = 171047240. Its totient is φ = 21749472.

The previous prime is 65249377. The next prime is 65249399. The reversal of 65249388 is 88394256.

65249388 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 (65249377) and next prime (65249399).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×65249388³ (a number of 24 digits) contains 333 as substring.

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 11 ways as a sum of consecutive naturals, for example, 32593 + ... + 34536.

Almost surely, 2^65249388 is an apocalyptic number.

It is an amenable number.

65249388 is an abundant number, since it is smaller than the sum of its proper divisors (105797852).

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

65249388 is a wasteful number, since it uses less digits than its factorization.

65249388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67148 (or 67134 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 65249388 is about 8077.7093287639. The cubic root of 65249388 is about 402.5861353920.

The spelling of 65249388 in words is "sixty-five million, two hundred forty-nine thousand, three hundred eighty-eight".