64799220 has 24 divisors (see below), whose sum is σ = 181437984. Its totient is φ = 17279776.

The previous prime is 64799213. The next prime is 64799227. The reversal of 64799220 is 2299746.

It is an interprime number because it is at equal distance from previous prime (64799213) and next prime (64799227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64799227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539934 + ... + 540053.

It is an arithmetic number, because the mean of its divisors is an integer number (7559916).

Almost surely, 2^64799220 is an apocalyptic number.

64799220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64799220 is an abundant number, since it is smaller than the sum of its proper divisors (116638764).

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

64799220 is a wasteful number, since it uses less digits than its factorization.

64799220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079999 (or 1079997 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 64799220 is about 8049.7962707139. The cubic root of 64799220 is about 401.6581584450.

The spelling of 64799220 in words is "sixty-four million, seven hundred ninety-nine thousand, two hundred twenty".