65481228 has 18 divisors (see below), whose sum is σ = 165522084. Its totient is φ = 21827064.

The previous prime is 65481211. The next prime is 65481281. The reversal of 65481228 is 82218456.

65481228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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: 1818923 = 65481228 / (6 + 5 + 4 + 8 + 1 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 65481192 and 65481201.

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 5 ways as a sum of consecutive naturals, for example, 909426 + ... + 909497.

Almost surely, 2^65481228 is an apocalyptic number.

It is an amenable number.

65481228 is an abundant number, since it is smaller than the sum of its proper divisors (100040856).

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

65481228 is a wasteful number, since it uses less digits than its factorization.

65481228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818933 (or 1818928 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 65481228 is about 8092.0472069804. The cubic root of 65481228 is about 403.0623863092.

It can be divided in two parts, 6548 and 1228, that added together give a 5-th power (7776 = 6⁵).

The spelling of 65481228 in words is "sixty-five million, four hundred eighty-one thousand, two hundred twenty-eight".