64838020 has 24 divisors (see below), whose sum is σ = 146634264. Its totient is φ = 23940096.

The previous prime is 64838009. The next prime is 64838021. The reversal of 64838020 is 2083846.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2869636 + 61968384 = 1694^2 + 7872^2 .

It is a super-3 number, since 3×64838020³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64838021) 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, 124429 + ... + 124948.

It is an arithmetic number, because the mean of its divisors is an integer number (6109761).

Almost surely, 2^64838020 is an apocalyptic number.

It is an amenable number.

64838020 is an abundant number, since it is smaller than the sum of its proper divisors (81796244).

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

64838020 is a wasteful number, since it uses less digits than its factorization.

64838020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249399 (or 249397 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 64838020 is about 8052.2059089420. The cubic root of 64838020 is about 401.7383097549.

The spelling of 64838020 in words is "sixty-four million, eight hundred thirty-eight thousand, twenty".