642652050 has 48 divisors (see below), whose sum is σ = 1595335392. Its totient is φ = 171206400.

The previous prime is 642651983. The next prime is 642652051. The reversal of 642652050 is 50256246.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 642651999 and 642652017.

It is not an unprimeable number, because it can be changed into a prime (642652051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265345 + ... + 267755.

It is an arithmetic number, because the mean of its divisors is an integer number (33236154).

Almost surely, 2^642652050 is an apocalyptic number.

642652050 is an abundant number, since it is smaller than the sum of its proper divisors (952683342).

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

642652050 is a wasteful number, since it uses less digits than its factorization.

642652050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203 (or 4198 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 642652050 is about 25350.5828335366. The cubic root of 642652050 is about 862.9625831971.

The spelling of 642652050 in words is "six hundred forty-two million, six hundred fifty-two thousand, fifty".