65409036 has 96 divisors (see below), whose sum is σ = 196922880. Its totient is φ = 16396800.

The previous prime is 65409031. The next prime is 65409059. The reversal of 65409036 is 63090456.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 65408988 and 65409006.

It is not an unprimeable number, because it can be changed into a prime (65409031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25576 + ... + 28016.

It is an arithmetic number, because the mean of its divisors is an integer number (2051280).

Almost surely, 2^65409036 is an apocalyptic number.

65409036 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65409036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98461440).

65409036 is an abundant number, since it is smaller than the sum of its proper divisors (131513844).

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

65409036 is a wasteful number, since it uses less digits than its factorization.

65409036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495 (or 2493 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 65409036 is about 8087.5853009412. The cubic root of 65409036 is about 402.9142085767.

It can be divided in two parts, 6540 and 9036, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 65409036 in words is "sixty-five million, four hundred nine thousand, thirty-six".