64620342 has 40 divisors (see below), whose sum is σ = 145490400. Its totient is φ = 21437136.

The previous prime is 64620329. The next prime is 64620343. The reversal of 64620342 is 24302646.

64620342 is a `hidden beast` number, since 6 + 4 + 620 + 34 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64620343) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37884 + ... + 39552.

It is an arithmetic number, because the mean of its divisors is an integer number (3637260).

Almost surely, 2^64620342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64620342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72745200).

64620342 is an abundant number, since it is smaller than the sum of its proper divisors (80870058).

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

64620342 is a wasteful number, since it uses less digits than its factorization.

64620342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922 (or 1913 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 64620342 is about 8038.6778763675. The cubic root of 64620342 is about 401.2882258979.

Adding to 64620342 its reverse (24302646), we get a palindrome (88922988).

The spelling of 64620342 in words is "sixty-four million, six hundred twenty thousand, three hundred forty-two".