64202420 has 12 divisors (see below), whose sum is σ = 134825124. Its totient is φ = 25680960.

The previous prime is 64202401. The next prime is 64202429. The reversal of 64202420 is 2420246.

It can be written as a sum of positive squares in 2 ways, for example, as 29463184 + 34739236 = 5428^2 + 5894^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 3210121 = 64202420 / (6 + 4 + 2 + 0 + 2 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 64202392 and 64202401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64202429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605041 + ... + 1605080.

It is an arithmetic number, because the mean of its divisors is an integer number (11235427).

Almost surely, 2^64202420 is an apocalyptic number.

It is an amenable number.

64202420 is an abundant number, since it is smaller than the sum of its proper divisors (70622704).

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

64202420 is a wasteful number, since it uses less digits than its factorization.

64202420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210130 (or 3210128 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 64202420 is about 8012.6412624053. The cubic root of 64202420 is about 400.4212645181.

Adding to 64202420 its reverse (2420246), we get a palindrome (66622666).

The spelling of 64202420 in words is "sixty-four million, two hundred two thousand, four hundred twenty".