65540394 has 32 divisors (see below), whose sum is σ = 149586240. Its totient is φ = 21255696.

The previous prime is 65540393. The next prime is 65540407. The reversal of 65540394 is 49304556.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65540393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14404 + ... + 18399.

It is an arithmetic number, because the mean of its divisors is an integer number (4674570).

Almost surely, 2^65540394 is an apocalyptic number.

65540394 is an abundant number, since it is smaller than the sum of its proper divisors (84045846).

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

65540394 is a wasteful number, since it uses less digits than its factorization.

65540394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32851 (or 32845 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 65540394 is about 8095.7021931393. The cubic root of 65540394 is about 403.1837463332.

The spelling of 65540394 in words is "sixty-five million, five hundred forty thousand, three hundred ninety-four".