64091398 has 8 divisors (see below), whose sum is σ = 109870992. Its totient is φ = 27467736.

The previous prime is 64091393. The next prime is 64091399. The reversal of 64091398 is 89319046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64091398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64091393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2288965 + ... + 2288992.

It is an arithmetic number, because the mean of its divisors is an integer number (13733874).

Almost surely, 2^64091398 is an apocalyptic number.

64091398 is a deficient number, since it is larger than the sum of its proper divisors (45779594).

64091398 is a wasteful number, since it uses less digits than its factorization.

64091398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4577966.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 64091398 is about 8005.7103370032. The cubic root of 64091398 is about 400.1903219295.

The spelling of 64091398 in words is "sixty-four million, ninety-one thousand, three hundred ninety-eight".