64397998 has 8 divisors (see below), whose sum is σ = 110396592. Its totient is φ = 27599136.

The previous prime is 64397987. The next prime is 64398007. The reversal of 64397998 is 89979346.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2299915 + ... + 2299942.

It is an arithmetic number, because the mean of its divisors is an integer number (13799574).

Almost surely, 2^64397998 is an apocalyptic number.

64397998 is a deficient number, since it is larger than the sum of its proper divisors (45998594).

64397998 is a wasteful number, since it uses less digits than its factorization.

64397998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599866.

The product of its digits is 2939328, while the sum is 55.

The square root of 64397998 is about 8024.8363223184. The cubic root of 64397998 is about 400.8274496375.

The spelling of 64397998 in words is "sixty-four million, three hundred ninety-seven thousand, nine hundred ninety-eight".