65885440 has 36 divisors (see below), whose sum is σ = 157819284. Its totient is φ = 26353664.

The previous prime is 65885423. The next prime is 65885459. The reversal of 65885440 is 4458856.

It can be written as a sum of positive squares in 2 ways, for example, as 15872256 + 50013184 = 3984^2 + 7072^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 65885393 and 65885402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24457 + ... + 27016.

It is an arithmetic number, because the mean of its divisors is an integer number (4383869).

Almost surely, 2^65885440 is an apocalyptic number.

It is an amenable number.

65885440 is an abundant number, since it is smaller than the sum of its proper divisors (91933844).

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

65885440 is an equidigital number, since it uses as much as digits as its factorization.

65885440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51494 (or 51480 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 65885440 is about 8116.9846618064. The cubic root of 65885440 is about 403.8900462137.

The spelling of 65885440 in words is "sixty-five million, eight hundred eighty-five thousand, four hundred forty".