64028399 has 8 divisors (see below), whose sum is σ = 65819952. Its totient is φ = 62258560.

The previous prime is 64028387. The next prime is 64028401. The reversal of 64028399 is 99382046.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64028399 - 2⁴ = 64028383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64028099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644 + ... + 11334.

It is an arithmetic number, because the mean of its divisors is an integer number (8227494).

Almost surely, 2^64028399 is an apocalyptic number.

64028399 is a deficient number, since it is larger than the sum of its proper divisors (1791553).

64028399 is a wasteful number, since it uses less digits than its factorization.

64028399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10857.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 64028399 is about 8001.7747406435. The cubic root of 64028399 is about 400.0591558344.

The spelling of 64028399 in words is "sixty-four million, twenty-eight thousand, three hundred ninety-nine".