65431436 has 48 divisors (see below), whose sum is σ = 140035392. Its totient is φ = 26112000.

The previous prime is 65431427. The next prime is 65431469. The reversal of 65431436 is 63413456.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

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, 47396 + ... + 48756.

It is an arithmetic number, because the mean of its divisors is an integer number (2917404).

Almost surely, 2^65431436 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 65431436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70017696).

65431436 is an abundant number, since it is smaller than the sum of its proper divisors (74603956).

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

65431436 is a wasteful number, since it uses less digits than its factorization.

65431436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1488 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 65431436 is about 8088.9700209606. The cubic root of 65431436 is about 402.9601973715.

The spelling of 65431436 in words is "sixty-five million, four hundred thirty-one thousand, four hundred thirty-six".