65434440 has 64 divisors (see below), whose sum is σ = 203083200. Its totient is φ = 16846592.

The previous prime is 65434429. The next prime is 65434511. The reversal of 65434440 is 4443456.

It is a super-2 number, since 2×65434440² = 8563331876227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 65434398 and 65434407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5922 + ... + 12881.

It is an arithmetic number, because the mean of its divisors is an integer number (3173175).

Almost surely, 2^65434440 is an apocalyptic number.

65434440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65434440 is an abundant number, since it is smaller than the sum of its proper divisors (137648760).

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

65434440 is a wasteful number, since it uses less digits than its factorization.

65434440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846 (or 18842 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 65434440 is about 8089.1557037802. The cubic root of 65434440 is about 402.9663639991.

Adding to 65434440 its reverse (4443456), we get a palindrome (69877896).

The spelling of 65434440 in words is "sixty-five million, four hundred thirty-four thousand, four hundred forty".