65190728 has 8 divisors (see below), whose sum is σ = 122232630. Its totient is φ = 32595360.

The previous prime is 65190683. The next prime is 65190731. The reversal of 65190728 is 82709156.

It can be written as a sum of positive squares in only one way, i.e., 52388644 + 12802084 = 7238^2 + 3578^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 65190691 and 65190700.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4074413 + ... + 4074428.

Almost surely, 2^65190728 is an apocalyptic number.

It is an amenable number.

65190728 is a deficient number, since it is larger than the sum of its proper divisors (57041902).

65190728 is a wasteful number, since it uses less digits than its factorization.

65190728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8148847 (or 8148843 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 65190728 is about 8074.0775324491. The cubic root of 65190728 is about 402.4654559297.

The spelling of 65190728 in words is "sixty-five million, one hundred ninety thousand, seven hundred twenty-eight".