65431960 has 64 divisors (see below), whose sum is σ = 162064800. Its totient is φ = 23774080.

The previous prime is 65431957. The next prime is 65431969. The reversal of 65431960 is 6913456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65431969) 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, 52626 + ... + 53854.

Almost surely, 2^65431960 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 65431960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81032400).

65431960 is an abundant number, since it is smaller than the sum of its proper divisors (96632840).

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

65431960 is a wasteful number, since it uses less digits than its factorization.

65431960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 65431960 is about 8089.0024106808. The cubic root of 65431960 is about 402.9612730551.

The spelling of 65431960 in words is "sixty-five million, four hundred thirty-one thousand, nine hundred sixty".