64890355 has 8 divisors (see below), whose sum is σ = 78335712. Its totient is φ = 51600768.

The previous prime is 64890349. The next prime is 64890359. The reversal of 64890355 is 55309846.

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 64890355 - 2⁵ = 64890323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64890359) 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, 38022 + ... + 39691.

It is an arithmetic number, because the mean of its divisors is an integer number (9791964).

Almost surely, 2^64890355 is an apocalyptic number.

64890355 is a deficient number, since it is larger than the sum of its proper divisors (13445357).

64890355 is a wasteful number, since it uses less digits than its factorization.

64890355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77885.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 64890355 is about 8055.4549840465. The cubic root of 64890355 is about 401.8463704272.

The spelling of 64890355 in words is "sixty-four million, eight hundred ninety thousand, three hundred fifty-five".