65940228 has 18 divisors (see below), whose sum is σ = 166682334. Its totient is φ = 21980064.

The previous prime is 65940227. The next prime is 65940269. The reversal of 65940228 is 82204956.

It is a happy number.

65940228 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., 60093504 + 5846724 = 7752^2 + 2418^2 .

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

It is a super-2 number, since 2×65940228² = 8696227337383968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1831673 = 65940228 / (6 + 5 + 9 + 4 + 0 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 65940192 and 65940201.

It is not an unprimeable number, because it can be changed into a prime (65940221) 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, 915801 + ... + 915872.

Almost surely, 2^65940228 is an apocalyptic number.

It is an amenable number.

65940228 is an abundant number, since it is smaller than the sum of its proper divisors (100742106).

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

65940228 is a wasteful number, since it uses less digits than its factorization.

65940228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831683 (or 1831678 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 65940228 is about 8120.3588590653. The cubic root of 65940228 is about 404.0019687516.

The spelling of 65940228 in words is "sixty-five million, nine hundred forty thousand, two hundred twenty-eight".