64620258 has 32 divisors (see below), whose sum is σ = 131127360. Its totient is φ = 21228480.

The previous prime is 64620251. The next prime is 64620277. The reversal of 64620258 is 85202646.

64620258 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64620251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170313 + ... + 170691.

It is an arithmetic number, because the mean of its divisors is an integer number (4097730).

Almost surely, 2^64620258 is an apocalyptic number.

64620258 is an abundant number, since it is smaller than the sum of its proper divisors (66507102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64620258 is a wasteful number, since it uses less digits than its factorization.

64620258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 64620258 is about 8038.6726516260. The cubic root of 64620258 is about 401.2880520196.

It can be divided in two parts, 6 and 4620258, that added together give a palindrome (4620264).

The spelling of 64620258 in words is "sixty-four million, six hundred twenty thousand, two hundred fifty-eight".