65409792 has 144 divisors (see below), whose sum is σ = 207997440. Its totient is φ = 17875968.

The previous prime is 65409787. The next prime is 65409793. The reversal of 65409792 is 29790456.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (65409793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2843893 + ... + 2843915.

Almost surely, 2^65409792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65409792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103998720).

65409792 is an abundant number, since it is smaller than the sum of its proper divisors (142587648).

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

65409792 is an frugal number, since it uses more digits than its factorization.

65409792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 65409792 is about 8087.6320391076. The cubic root of 65409792 is about 402.9157608697.

The spelling of 65409792 in words is "sixty-five million, four hundred nine thousand, seven hundred ninety-two".