424128642 has 32 divisors (see below), whose sum is σ = 973233792. Its totient is φ = 120705024.

The previous prime is 424128623. The next prime is 424128647. The reversal of 424128642 is 246821424.

It is not an unprimeable number, because it can be changed into a prime (424128647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8853 + ... + 30440.

It is an arithmetic number, because the mean of its divisors is an integer number (30413556).

Almost surely, 2^424128642 is an apocalyptic number.

424128642 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

424128642 is an abundant number, since it is smaller than the sum of its proper divisors (549105150).

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

424128642 is a wasteful number, since it uses less digits than its factorization.

424128642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39562.

The product of its digits is 24576, while the sum is 33.

The square root of 424128642 is about 20594.3837489739. The cubic root of 424128642 is about 751.3331205377. Note that the first 3 decimals are identical.

It can be divided in two parts, 4241286 and 42, that added together give a triangular number (4241328 = T₂₉₁₂).

The spelling of 424128642 in words is "four hundred twenty-four million, one hundred twenty-eight thousand, six hundred forty-two".