642439350 has 480 divisors, whose sum is σ = 2281568256. Its totient is φ = 130636800.

The previous prime is 642439337. The next prime is 642439361. The reversal of 642439350 is 53934246.

642439350 is a `hidden beast` number, since 64 + 243 + 9 + 350 = 666.

642439350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 14940429 + ... + 14940471.

Almost surely, 2^642439350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642439350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1140784128).

642439350 is an abundant number, since it is smaller than the sum of its proper divisors (1639128906).

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

642439350 is a wasteful number, since it uses less digits than its factorization.

642439350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 642439350 is about 25346.3873165388. The cubic root of 642439350 is about 862.8673671335.

The spelling of 642439350 in words is "six hundred forty-two million, four hundred thirty-nine thousand, three hundred fifty".