65399390 has 16 divisors (see below), whose sum is σ = 134536032. Its totient is φ = 22422624.

The previous prime is 65399359. The next prime is 65399393. The reversal of 65399390 is 9399356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65399393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467069 + ... + 467208.

It is an arithmetic number, because the mean of its divisors is an integer number (8408502).

Almost surely, 2^65399390 is an apocalyptic number.

65399390 is an abundant number, since it is smaller than the sum of its proper divisors (69136642).

65399390 is a wasteful number, since it uses less digits than its factorization.

65399390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934291.

The product of its (nonzero) digits is 196830, while the sum is 44.

The square root of 65399390 is about 8086.9889328476. The cubic root of 65399390 is about 402.8944014177.

The spelling of 65399390 in words is "sixty-five million, three hundred ninety-nine thousand, three hundred ninety".