65406396 has 48 divisors (see below), whose sum is σ = 169239168. Its totient is φ = 19492800.

The previous prime is 65406389. The next prime is 65406401. The reversal of 65406396 is 69360456.

It is a happy number.

It is a congruent number.

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, 3991 + ... + 12113.

It is an arithmetic number, because the mean of its divisors is an integer number (3525816).

Almost surely, 2^65406396 is an apocalyptic number.

65406396 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65406396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84619584).

65406396 is an abundant number, since it is smaller than the sum of its proper divisors (103832772).

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

65406396 is a wasteful number, since it uses less digits than its factorization.

65406396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8202 (or 8200 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 65406396 is about 8087.4220861780. The cubic root of 65406396 is about 402.9087877771.

The spelling of 65406396 in words is "sixty-five million, four hundred six thousand, three hundred ninety-six".