642802230 has 160 divisors (see below), whose sum is σ = 2003690304. Its totient is φ = 144820224.

The previous prime is 642802217. The next prime is 642802253. The reversal of 642802230 is 32208246.

642802230 is a `hidden beast` number, since 6 + 428 + 0 + 2 + 230 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 642802194 and 642802203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 413134 + ... + 414686.

Almost surely, 2^642802230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642802230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001845152).

642802230 is an abundant number, since it is smaller than the sum of its proper divisors (1360888074).

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

642802230 is a wasteful number, since it uses less digits than its factorization.

642802230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1643 counting only the distinct ones).

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

The square root of 642802230 is about 25353.5447225827. The cubic root of 642802230 is about 863.0297992626.

The spelling of 642802230 in words is "six hundred forty-two million, eight hundred two thousand, two hundred thirty".