64146420 has 144 divisors (see below), whose sum is σ = 212808960. Its totient is φ = 15545088.

The previous prime is 64146373. The next prime is 64146421. The reversal of 64146420 is 2464146.

64146420 is a `hidden beast` number, since 6 + 4 + 14 + 642 + 0 = 666.

It is a super-2 number, since 2×64146420² = 8229526397632800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64146421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184687 + ... + 185033.

It is an arithmetic number, because the mean of its divisors is an integer number (1477840).

Almost surely, 2^64146420 is an apocalyptic number.

64146420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64146420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106404480).

64146420 is an abundant number, since it is smaller than the sum of its proper divisors (148662540).

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

64146420 is a wasteful number, since it uses less digits than its factorization.

64146420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 64146420 is about 8009.1460218927. The cubic root of 64146420 is about 400.3048093358.

The spelling of 64146420 in words is "sixty-four million, one hundred forty-six thousand, four hundred twenty".