65235978 has 12 divisors (see below), whose sum is σ = 141344658. Its totient is φ = 21745320.

The previous prime is 65235971. The next prime is 65235979. The reversal of 65235978 is 87953256.

It is a happy number.

65235978 is a `hidden beast` number, since 6 + 52 + 3 + 597 + 8 = 666.

65235978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 59490369 + 5745609 = 7713^2 + 2397^2 .

It is not an unprimeable number, because it can be changed into a prime (65235971) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1812093 + ... + 1812128.

Almost surely, 2^65235978 is an apocalyptic number.

65235978 is an abundant number, since it is smaller than the sum of its proper divisors (76108680).

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

65235978 is a wasteful number, since it uses less digits than its factorization.

65235978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624229 (or 3624226 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 65235978 is about 8076.8792240568. The cubic root of 65235978 is about 402.5585537797.

The spelling of 65235978 in words is "sixty-five million, two hundred thirty-five thousand, nine hundred seventy-eight".