642062020 has 48 divisors (see below), whose sum is σ = 1422852480. Its totient is φ = 242882816.

The previous prime is 642062011. The next prime is 642062039. The reversal of 642062020 is 20260246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642061982 and 642062000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33099 + ... + 48781.

It is an arithmetic number, because the mean of its divisors is an integer number (29642760).

Almost surely, 2^642062020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642062020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (711426240).

642062020 is an abundant number, since it is smaller than the sum of its proper divisors (780790460).

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

642062020 is a wasteful number, since it uses less digits than its factorization.

642062020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15804 (or 15802 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 642062020 is about 25338.9427561609. The cubic root of 642062020 is about 862.6984020229.

The spelling of 642062020 in words is "six hundred forty-two million, sixty-two thousand, twenty".