65280136 has 32 divisors (see below), whose sum is σ = 133113240. Its totient is φ = 29887488.

The previous prime is 65280109. The next prime is 65280139. The reversal of 65280136 is 63108256.

It can be written as a sum of positive squares in 4 ways, for example, as 56340036 + 8940100 = 7506^2 + 2990^2 .

It is a super-2 number, since 2×65280136² = 8522992312356992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65280098 and 65280107.

It is not an unprimeable number, because it can be changed into a prime (65280139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455 + ... + 11518.

Almost surely, 2^65280136 is an apocalyptic number.

It is an amenable number.

65280136 is an abundant number, since it is smaller than the sum of its proper divisors (67833104).

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

65280136 is a wasteful number, since it uses less digits than its factorization.

65280136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13033 (or 13029 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 65280136 is about 8079.6123669394. The cubic root of 65280136 is about 402.6493634413.

The spelling of 65280136 in words is "sixty-five million, two hundred eighty thousand, one hundred thirty-six".